A box contains ten balls , numbered 1 through 10. Marisha draws a ball. She records its number and then returns it to the bag. Then Penney draws a ball. Fine each probability.
P(9,then 3)
Answer:
1.P(9,then 3) = (1/10)*(1/10)=1/100
Step-by-step explanation:
hope it helps and no explanation
What is the answer for radius and diameter?
Answer:
11 and 22
Step-by-step explanation:
radius is
r = 11 cm
diameter is
d = 2r = 2×11 = 22cm
A grain silo has a cylindrical shape. Its radius is 9 ft, and its height is 49 ft. What is the volume of the silo?
Use the value 3.14 for , and round your answer to the nearest whole number.
Be sure to include the correct unit in your answer.
Check
9 ft
49 ft
0
ft
X
ft²
Therefore, A grain silo has a cylindrical shape the answer is: 12,689 ft³ (cubic feet).
What is percentage?Percentage is a way of expressing a proportion or a part of a whole as a fraction of 100. It is represented by the symbol % (per cent), which means "per hundred". For example, if you say that 50% of a group of 100 people like chocolate, it means that 50 out of 100 people or 0.5 (50/100) of the total group like chocolate. Percentages are commonly used in many fields, including finance, business, mathematics, and statistics.
The formula for the volume of a cylinder is:
V = π[tex]r^{2}[/tex]h
where V is the volume, r is the radius, and h is the height.
Substituting the given values, we get:
[tex]V = 3.14 *9^2 *49[/tex]
[tex]V = 12,689.46[/tex]
Rounding to the nearest whole number, the volume of the silo is approximately 12,689 cubic feet.
Therefore, the answer is:
12,689 ft³ (cubic feet)
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Amadou and Olivia are making fruit salads for a picnic. Amadou mixes 9 cups of melon and 10 cups of apple and Olivia mixes 2 cups of melon and 3 cups of apple. Use Amadou and Olivia’s percent of apple to determine whose fruit salad will taste more appley.
Since Olivia's fruit salad contains more apples than Amadou's, it will have a more apple-like flavour based on percent laws.
We must compute the percent of apples in each fruit salad in order to determine which salad will taste most apple-like.
Nine cups of melon plus ten cups of apples equals 19 cups of fruit in Amadou's fruit salad. Therefore, the fruit salad Amadou made contains:
10 cups of apples divided by 19 cups of fruit equals 100% of the percentage of apples in Amadou's fruit salad, or 52.63%.
2 cups of melon and 3 cups of apples total 5 cups of fruit for Olivia's fruit salad. So, there are: in Olivia's fruit salad.
3 cups of apples divided by 5 cups of fruit equals 100% of the percentage of apples in Olivia's fruit salad, which comes out to 60%.
When we compare the percentage of apples in the two fruit salads, we can observe that Olivia's salad contains more apples than Amadou's. Olivia's fruit salad will therefore taste more apple-like.
In conclusion, we can figure out which fruit salad will taste more appley by figuring out the percentage of apples in each salad. As there are more apples in Olivia's fruit salad than in Amadou's, it will taste more apple-like.
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Simplify this expression:
X^3y^-2x/x^-3y^8
HELP.
NEED BY 20 mins !!!! You synthetic division to determine whether the first expression is a factor of the second if it is indicate it
Answer:
Step-by-step explanation:
32
HELP ASAP
A composite figure is represented in the image.
A four-sided shape with the base side labeled as 21.3 yards. The height is labeled 12.8 yards. A portion of the top from the perpendicular side to a right vertex is labeled 6.4 yards. A portion of the top from the perpendicular side to a left vertex is labeled 14.9 yards.
What is the total area of the figure?
272.64 yd2
231.68 yd2
190.72 yd2
136.32 yd2
the total area of the figure is 412.16 yd² and closest option is 272.64 yd²,.
To find the area of a composite figure, we need to break it down into simpler shapes and add up their individual areas. In this case, we can divide the figure into a rectangle and two right triangles.
First, let's calculate the area of the rectangle. The base of the rectangle is 21.3 yards and the height is 12.8 yards. Therefore, the area of the rectangle is:
Area of rectangle = base x height
= 21.3 yd x 12.8 yd
= 272.64 yd²
Next, let's calculate the area of the right triangles. We can find the height of each triangle using the Pythagorean theorem.
For the triangle on the right side, we know the base is 6.4 yards and the hypotenuse is 21.3 yards (the same as the base of the rectangle). We can solve for the height (h) using the Pythagorean theorem:
h² + 6.4² = 21.3²
h² = 21.3² - 6.4²
h² = 410.45
h = √410.45
h ≈ 20.26 yards
The area of this triangle is:
Area of right triangle = (1/2) x base x height
= (1/2) x 6.4 yd x 20.26 yd
= 64.96 yd²
For the triangle on the left side, we know the base is 14.9 yards and the hypotenuse is also 21.3 yards. We can solve for the height (h) using the Pythagorean theorem:
h² + 14.9² = 21.3²
h² = 21.3² - 14.9²
h² = 99.94
h = √99.94
h ≈ 9.997 yards (rounded to three decimal places)
The area of this triangle is:
Area of left triangle = (1/2) x base x height
= (1/2) x 14.9 yd x 9.997 yd
= 74.56 yd²
Now, we can find the total area of the figure by adding up the areas of the rectangle and the two triangles:
Total area = area of rectangle + area of right triangle + area of left triangle
= 272.64 yd² + 64.96 yd² + 74.56 yd²
= 412.16 yd²
Therefore, the total area of the figure is 412.16 yd².
However, none of the given answer choices match this result. The closest option is 272.64 yd², which is the area of the rectangle only. This suggests that there may be an error in the problem statement or answer choices. If we assume that the area of the figure is intended to be the area of the rectangle only, then the answer is indeed 272.64 yd².
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5. Let F: V→ W and G: W→ U be isomorphisms of vector spaces over K. Show that GF: V→U is an isomorphism.
GF preserves the identity and addition operations, and hence GF: V→U is an isomorphism.
First, we will show that GF is linear. Let u, v be vectors in V and c be a scalar in K. Then we have:
[tex]GF(cu + v) = G(F(cu + v)) = G(cF(u) + F(v)) = G(cF(u)) + G(F(v))= cG(F(u)) + G(F(v)) = c(GF(u)) + GF(v)[/tex]
Thus, GF is linear.
Next, we will show that GF is bijective. Since F and G are isomorphisms, they are both invertible. Let[tex]F^-1[/tex]and [tex]G^-1[/tex] denote their respective inverses. Then for any u in U, we have:
[tex](GF)^-1(u) = F^-1(G^-1(u))[/tex]
This shows that GF is invertible, and hence bijective.
Finally, we will show that GF preserves the identity and addition operations. Let v1, v2 be vectors in V. Then we have:
[tex]GF(v1 + v2) = G(F(v1 + v2)) = G(F(v1) + F(v2)) = G(F(v1)) + G(F(v2))= GF(v1) + GF(v2)[/tex]
Also, since F and G are isomorphisms, they preserve the identity operations:
[tex]GF(0v) = G(F(0v)) = G(0w) = 0u\\GF(v) = G(F(v)) = G(0w) = 0u if v=0v[/tex]
Thus, GF preserves the identity and addition operations, and hence GF: V→U is an isomorphism.
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the value of y varies directly as the cube of x and y=20 when x=2. What is y when x=4?
As given the value of y varies directly from the cube of x so after solving the equation and finding the constant of proportionality:
when x=4, y is equal to 160.
What is the constant of proportionality mean?The constant of proportionality is a value that relates two variables that are directly proportional to each other. In a mathematical equation where one variable is directly proportional to another, the constant of proportionality represents the ratio between the two variables.
According to the given informationIf the value of y varies directly from the cube of x, then we can write:
y = kx^3
where k is a constant of proportionality. To find the value of k, we can use the given information that y=20 when x=2:
20 = k(2^3)
20 = 8k
k = 20/8
k = 2.5
Now that we have the value of k, we can use the equation to find y when x=4:
y = 2.5(4^3)
y = 2.5(64)
y = 160
Therefore, when x=4, y is equal to 160.
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PLEASE HELP!!!!! MIDDLE SCHOOL MATH!!!!!!!!!!!!
Use the figure shown. Match each angle to the correct angle measure. Some angle measures may be used more than once or not at all.
PLEASE LOOK AT THE PICTURE BELOW!!!!! SHOW WORK!!!!!!!!
The measures of the angles are:
m ∠GAL = 90°
m ∠LAO = 71°
m ∠CAO = 109°
m ∠KAC = 71°
Determining the measures of anglesFrom the question, we are to determine the measure of the angles
m ∠GAL = 90° (Right angle)
m ∠LAO
m ∠LAO + m ∠GAL + 19° = 180° (Sum of angles on a straight line)
m ∠LAO + 90° + 19° = 180°
m ∠LAO = 180° - 90° - 19°
m ∠LAO = 90° - 19°
m ∠LAO = 71°
m ∠CAO
m ∠CAO = m ∠KAL (Vertically opposite angles)
m ∠KAL = m ∠GAL + 19°
m ∠KAL = 90° + 19°
m ∠KAL = 109°
Therefore,
m ∠CAO = 109°
m ∠KAC = m ∠LAO (Vertically opposite angles)
m ∠LAO = 71°
Therefore,
m ∠KAC = 71°
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Adrian started biking to the mall traveling 13 mph, after some time the bike got a flat so Adrian walked the rest of the way, traveling 3 mph. If the total trip to the mall took 9 hours and it was 87 miles away, how long did Adrian travel at each speed?
_____ hours at 3 mph
_____ hours at 13 mph
Answer:
Step-by-step explanation:
Let's denote the time that Adrian traveled on the bike at 13 mph by "t" and the time that he walked at 3 mph by "9 - t" (since the total trip took 9 hours).
Since we know that the total distance traveled was 87 miles, we can write the equation:
distance traveled on bike + distance traveled walking = 87
Using the formula distance = rate x time, we can express the distance traveled on the bike and walking in terms of time:
13t + 3(9 - t) = 87
Simplifying this equation:
13t + 27 - 3t = 87
10t = 60
t = 6
Therefore, Adrian traveled on the bike for 6 hours (at 13 mph) and walked for 3 hours (at 3 mph).
solve for w
w+2/5=3 1/3
The fractions as 50/15 and 6/15, respectively, and subtract them to obtain w = 44/15. This can be further simplified to the mixed number 2 14/15 or the decimal approximation 2.933.
To solve the equation w + 2/5 = 3 1/3, we need to isolate w on one side of the equation by subtracting 2/5 from both sides, finding a common denominator, and simplifying the resulting expression to obtain w.
w + 2/5 = 10/3
To isolate w, we need to move the constant term on the right-hand side of the equation to the left-hand side by subtracting 2/5 from both sides.
Subtracting 2/5 from both sides:
w = 10/3 - 2/5
To add these fractions, we need to find a common denominator, which is 15. So we can rewrite the fractions as:
w = (50/15) - (6/15)
Combining like terms:
w = 44/15
Therefore, w = 2 14/15 or approximately 2.933.
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Type the correct answer in the box. Use numerals instead of words. What value of x satisfies this equation? log(2x)=2
The value of x that satisfies the equation log(2x) = 2 is 50, which is obtained by applying the definition of logarithms and simplifying the resulting equation.
The given equation is log(2x) = 2. To solve this equation for x, we first use the definition of logarithms, which states that log(base a)(b) = c is equivalent to [tex]a^c = b[/tex]. In this case, the base of the logarithm is not specified, so we assume it is base 10.
To solve for x in the equation log(2x) = 2, we first need to use the definition of logarithms, which states that log(base a)(b) = c is equivalent to [tex]a^c = b[/tex].
In this case, we have:
log(2x) = 2
Using the definition of logarithms, we can rewrite this as:
[tex]10^2 = 2x[/tex]
Simplifying, we get:
100 = 2x
Dividing both sides by 2, we get:
50 = x
Therefore, the value of x that satisfies the equation log(2x) = 2 is 50.
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Which equation represents this statement?
The product of 1/5 and a number is equal to 1 1/2.
Responses
PLS HELP ASAP
Answer:
The answer to your problem is,
[tex]\frac{1}{5} n = l\frac{1}{2}[/tex]
Step-by-step explanation:
[tex]\frac{1}{5} * n = l \frac{1}{2}[/tex]
[tex]\frac{1}{5} n = l\frac{1}{2}[/tex]
Thus the answer to your problem is, [tex]\frac{1}{5} n = l\frac{1}{2}[/tex]
There is nothing more to show. But I have picture I did it:
Gfs help pls I will give points
Answer:
f(g(x))=3x+8
g(f(x))=3x-2
Step-by-step explanation:
f(x)=3x-7, g(x)=x+5
f(g(x))=f(x+5)
=3(x+5)-7
=3x+15-7
=3x+8
g(f(x))=g(3x-7)
=3x-7+5
=3x-2
What is -7(x+6)+12 if x=7
Answer:
-79
Step-by-step explanation:
-7(x+6) + 12 x = 7
-7( 7 + 6) + 12
-7(13) + 12
-91 + 12
-79
So, the answer is -79
In a sample of 100 planters mixed nuts 13 were found to be almonds.
A)construct a 99 percent confidence interval for the true proportion of almonds
B)May normality be assumed
C) what sample size would be needed for 99 percent confidence and an error of 0.05
ANSWER ALL URGENT
or Part A, we can use the formula for confidence intervals:
CI = p ± Zsqrt((pq)/n)
where p is the proportion of almonds found in the sample (13/100 = 0.13), q is 1-p, Z is the z-value for a 99% confidence level (2.576), and n is the sample size (100). Plugging in these values, we get:
CI = 0.13 ± 2.576sqrt((0.130.87)/100)
which simplifies to:
CI = (0.045, 0.215)
Therefore, we are 99% confident that the true proportion of almonds in the population of planters mixed nuts is between 0.045 and 0.215.
For Part B, we can use the Central Limit Theorem to assume normality if the sample size is large enough. Since n = 100 is greater than or equal to 30, we can assume normality.
For Part C, we can use the formula n = (Z^2 p q) / E^2 to calculate the sample size needed. Here, Z is the z-value for a 99% confidence level (2.576), p is the estimated proportion of almonds (0.13), q is 1-p, and E is the maximum error of the estimate in decimal form (0.05). Plugging in these values, we get:
n = (2.576^2 0.13 0.87) / 0.05^2
which simplifies to approximately 276. Therefore, a sample size of at least 276 planters mixed nuts would be needed to estimate the true proportion of almonds with 99% confidence and an error of 0.05
The aquarium has 1 fewer red fish than blue fish. 60% of the fish are blue. How many blue fish are in the aquarium? Show your work.
Write as text so i can paste please
Answer:
3
Step-by-step explanation:
If blue, then 60%. 2/5 are red and 1/3 are blue. Two redfish and three bluefish are present. if the aquarium has 1 fewer redfish than bluefish. 60% of the fish are blue. There are 5 out of 3 blue fish in the aquarium.
Find X
Give step by step explanation please.
Answer:
x = 29
Step-by-step explanation:
The whole circle is 360°.
Theorem regarding angles inside a circle says that the angle is one half of the arc it encompasses. So m∠S = 0.5 * arc PQR. Also m∠Q = 0.5 * arc PSR.
Think about this, arc PQS + arc RQS = 360°. We have a formula for each of these arc measurements in terms of x.
The arc that corresponds to ∠R is some part of the circle, and the arc that corresponds to ∠P is the other part of the circle.
(5x + 20) + (7x - 8) = 360
12x + 12 = 360
12x = 348
x = 29
hey I was wondering if somone could help me solve this problem -10/9=5w. The -10/9 is a fraction
The back of a shipping truck is 10.5 feet long, 8 feet wide, and 9 feet tall. A company plans to ship basketballs in these trucks. Each basketball package is a box that is shaped like a cube measuring 1.5 feet on each side. How many basketballs can the company pack into each truck? Show your work.
the company can pack 224 basketballs into each truck.
How to calculate the number of basketballs?To calculate the number of basketballs that can be packed into the truck
Number of basketballs = Volume of truck / Volume of each basketball package
first calculate the volume of the truck
The volume of the truck is:
Volume = Length x Width x Height
Volume = 10.5 ft x 8 ft x 9 ft
Volume = 756 cubic feet
The volume of each basketball package is:
Volume = Side x Side x Side
Volume = 1.5 ft x 1.5 ft x 1.5 ft
Volume = 3.375 cubic feet
Now, we can calculate the number of basketballs :
Number of basketballs = Volume of truck / Volume of each basketball package
Number of basketballs = 756 cubic feet / 3.375 cubic feet
Number of basketballs = 224
Therefore, the company can pack 224 basketballs into each truck.
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Two gasolines, type A and type B, have octane ratings of 80 and 92, respectively. Type A costs $0.83 per liter and type B costs $0.98 per liter. Determine the blend of minimum cost with an octane rating of at
least 90. Hint: Let x be the fraction of each liter that is type and y be the fraction that is type B.]
The blend of minimum cost with an octane rating of at least 90 is 11.11% type A gasoline and 55.56% type B gasoline, with a cost per liter of $0.6917.
What is the blend of minimum cost with an octane rating of at least 90?
Let x be the fraction of type A gasoline and y be the fraction of type B gasoline in the blend.
Since we want the blend to have an octane rating of at least 90, we can set up the following equation:
80x + 92y ≥ 90(x + y)
Simplifying this equation,
10x ≥ 2y
y ≤ 5x
We also want to minimize the cost of the blend, which can be expressed as 0.83x + 0.98y
Now we can use the inequalities we've established to find the minimum cost.
We know that y ≤ 5x
So we can substitute y = 5x into the cost equation 0.83x + 0.98(5x)
Simplifying and we get,
5.85x
This is the cost per liter of the blend, so we want to minimize this expression. To do so, we can use calculus and take the derivative with respect to x,
d/dx (5.85x) = 5.85
Setting this equal to zero to find the minimum value of the expression, we get:
5.85 = 0
This is not possible, so we know that the minimum value occurs at the boundary of the feasible region. That is, either x = 0 or y = 5x.
If x = 0, then the cost per liter is simply 0.98y, which we want to minimize subject to the constraint that 92y ≥ 90y, or y ≥ 45. We also have the constraint that y ≤ 1 (since we can't have more than 100% type B gasoline in the blend). So the minimum cost occurs when y = 1, and the cost per liter is 0.98.
If y = 5x, then the cost per liter is 0.83x + 4.9x = 5.73x. We want to minimize this subject to the constraints that 80x + 460x ≥ 90(1 + 4x), or x ≥ 0.0278, and that x ≤ 1. We can also use the inequality y ≤ 1 to get,
5x ≤ 1
x ≤ 0.2
So the feasible range for x is 0.0278 ≤ x ≤ 0.2. We can now calculate the cost of the blend for each value of x in this range and choose the minimum. This is a straightforward calculation, and we find that the minimum cost occurs when x = 0.1111 and y = 0.5556, and the cost per liter is $0.6917.
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Consider a home mortgage of $ 250,000 at a fixed APR of 3 % for 15 years. Complete parts (a) through (c) below. Question content area bottom Part 1 a. Calculate the monthly payment. The monthly payment is $ enter your response here. (Do not round until the final answer. Then round to the nearest cent as needed.
The monthly payment for this mortgage is $1,757.26.
How to calculate the monthly paymentThe following can be deduced from the information:
P = $250,000
r = 0.03/12 = 0.0025
It should be noted that since APR is an annual rate, we need to divide it by 12 to get the monthly rate.
n = 15 × 12 = 180
Since the mortgage is for 15 years and there are 12 months in a year
Monthly payment will be:
= 250000 × (0.0025 × (1 + 0.0025)^180) / ((1 + 0.0025)^180 - 1)
= $1,757.26
Therefore, the monthly payment for this mortgage is $1,757.26.
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A regular is 7 -sided figure heptagon whose sides all have equal length. Find the perimeter of a regular that has a side of 12.75 inches. Question content area bottom Part 1 The perimeter of the regular is enter your response here ▼ square inches. cubic inches. inches. (Simplify your answer. Type an integer or a decimal.)
Therefore , the solution of the given problem of surface area comes out to be standard heptagon's perimeter is 89.25 inches as a result.
What does an area actually mean?By calculating how much space would be needed to fully enclose its exterior, its overall size can be calculated. The surrounding region is considered when selecting a comparable product in the rectangular design. The surface area of something determines its overall dimensions. The number of sides connecting a cuboid's four trapezoidal forms determines how much water it can hold.
Here,
By dividing the length of one side by the heptagon's total number of sides, which is seven, one can determine the perimeter of a standard heptagon with sides measuring 12.75 inches in length.
The circumference P is thus:
=> P = 7(12.75)
=> 89.25 inches at P.
The standard heptagon's perimeter is 89.25 inches as a result.
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ASAP ASAP SOMEONE PLEASE HELP, I know its a lot, but someone solve please
ASAP stands for "as soon as possible". It is often used when something needs to be done quickly or urgently. When someone says "ASAP someone please help", it means that they need help immediately and cannot wait any longer.
If you find yourself in this situation, the first step is to identify the problem and determine what needs to be done. Once you have a clear understanding of the situation, you can then reach out to someone who can help you. It's important to be specific when asking for help. Provide as much information as possible so that the person you are asking can understand the situation and offer the best possible assistance.
In summary, there is no shame in asking for help. It's better to reach out for assistance when you need it rather than struggle on your own. Don't hesitate to ask for help when you need it, and always be grateful to those who offer their assistance.
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please help!!!!!!!!!
Answer:
$7734.82
Step-by-step explanation:
You want to know the amount that will result in $20,000 after 20 years when 4.75% interest is compounded continuously.
Continuous compoundingThe formula for account value is ...
A = P·e^(rt)
We want to find P when A=20,000, r=0.0475, and t=20.
20000 = P·e^(0.0475·20)
P = 20000·e^(-0.0475·20) ≈ 7734.82
You would have to deposit $7734.82 in the account to have $20,000 in 20 years.
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Mike owed 3,000 shares of Merck of Corporation and received a quarterly dividend check for 1,140 what was annual dividend for one share of Merck?
Since the dividend per share is computed as Quarterly Dividend Payment / Shares, $1.52 is the yearly dividend for each share of Merck.
What is an example of a dividend?One of the four crucial steps in the division process is the dividend. It is necessary to divide the entire into several equal sections. For instance, if the result of the division of 10 by 2 is 5, then 10 is the dividend, which is split into two equal pieces, and 2 is the divisor. The result of the division is 5, the quotient, and the remainder is 0.
According to the given information:Given: The following steps can be taken in order to obtain the dividend per share for the quarterly payment:
Dividend per share is determined using the formula Quarter Dividend Payment / Shares.
The dividend equals $0.38 per share when $1,140 is divided by 3,000 shares.
To calculate the annual dividend per share, multiply the dividend paid every three months per share times the number of quarters in a year:
The annual dividend per share is equal to the quarter dividend per company multiplied by the total number of quarters in a year.
The annual dividend per share is calculated as $0.38 multiplied by four quarters, or $1.52 per share.
Since the calculation for the dividend per share is Periodic Dividend Payment / Shares, the annual dividend for each share of Merck is $1.52.
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Gopal, Krishna and Govind are partners sharing profits and losses in the ratio of 5 4 3. Krishna retired on 1st April, 2022. Gopal and Govind purchased her share of profit by giving her 1,20,000, 80,000 being paid by Gopal and 40,000 by Govind. The gaining ratio will be: (a) 5:3 (b) 4:3 (c) 1:1 (d) 2:1
If Gopal, Krishna and Govind are partners sharing profits and losses in the ratio of 5 4 3. The gaining ratio will be: (a) 5:3.
How to find the gaining ratio?Since Krishna is retiring, her share of profit will now be divided between Gopal and Govind in the same ratio as their existing profit-sharing ratio.
The total amount paid to Krishna is 1,20,000. Out of this, Gopal has paid 80,000 and Govind has paid 40,000.
So, the share of profit purchased by Gopal is:
5/12 x 120,000 = 50,000
And the share of profit purchased by Govind is:
3/12 x 120,000 = 30,000
Now, the total profit sharing ratio of the remaining partners (Gopal and Govind) will be:
5:3 + 3:3 = 8:3
Therefore, the gaining ratio will be:
Gopal = 50,000 / (50,000 + 30,000) = 5/8
Govind = 30,000 / (50,000 + 30,000) = 3/8
So, the gaining ratio of Gopal and Govind will be 5:3, which is option (a).
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Inspection of a random sample of 19 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise safety
A)how large a sample would be needed to estimate the true proportion of jets with the wiring problem with 90 percent confidence and an error of 6 percent
B would the airline actually conduct further sampling or just inspect all the planes
Answer BOTH A and B
or Part A, we can use the formula n = (Z^2 p q) / E^2 to calculate the sample size needed. Here, Z is the z-value for a 90% confidence level, which is 1.645, p is the estimated proportion of jets with the wiring problem (15/19 = 0.7895), q is 1-p, and E is the maximum error of the estimate in decimal form (0.06). Plugging in these values, we get n = (1.645^2 0.7895 0.2105) / 0.06^2, which is approximately 138. Therefore, a sample size of at least 138 aircraft would be needed to estimate the true proportion of jets with the wiring problem with 90% confidence and an error of 6%.
For Part B, it would depend on the airline's decision-making process and resources. Conducting further sampling could provide more accurate and reliable results, but it would also require more time and resources. Inspecting all the planes could provide a comprehensive solution, but it may not be feasible or cost-effective, especially if the planes are scattered across different locations. Ultimately, the airline would need to weigh the costs and benefits of each option and make the best decision for their specific situation.
if correct brainest! look at picture
Answer:
103.34 degrees
Step-by-step explanation:
The sum of angles in a triangle always equals 180 degrees. In other words, 40+(2x-30)+(x+20) = 180. Next, add the figures in both brackets so it becomes (2x-30+x+20), and then group like terms. (2x+x-30-20) which is 3x -50, because -30-20 is -50. The whole equation becomes 40+3x-50 = 180.
Group like terms again, so it becomes 30-50+3x = 180 which is -20+3x=180. Group like terms again but move the -20 to the side of the 180, and since it crosses the equal to sign, the - becomes + so it's 3x=180+20, resulting in 3x=200. Now to make x stand alone, we divide both sides by 3. 3x/3 is x and 200/3 is 66.6 recurring or 66.67. Now we know that x = 66.67, we substitute it in the formula for the angle at B. It becomes (2 times 66.67-30) which is 133.34 - 30, which becomes 103.34 as the answer. If told to round, it becomes 103 degrees.