There are 20 identical solid hemispheres. The curved surface and the flat surface of each hemisphereare are to be painted red and yellow respectively. Find the ratio of the amount of red paint needed to the amount of yellow paint needed.​

Answers

Answer 1

Answer:

2:1.

Step-by-step explanation:

The area of a red  curved surface = 2πr^2.

The area of the yellow flat surface = πr^2.

This is the case for all the hemispheres.

Therefore the  required  ratio =  2πr^2 :  πr^2

= 2:1.


Related Questions

Khan Academy Shape: Pentagon Khan Academy HELP PLEASE - x=

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Answer:

x=100 degrees

Step-by-step explanation:

Answer:

x = 100 degrees

Step-by-step explanation:

HELPP ILL HIVE BRAINLIEST

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Answer:

part a: two is the y intercept because the line intercepts at two on the y-axis

part b: i don't know but gl

what is the domain of y=cos 0

Answers

The answer would be: -1<1<1

Answer:

The domain of y = cos θ is all real numbers. This is because any real number can be plugged in for θ and y will be equal to a real number. This can be shown graphically because the y = cos θ will go on infinitely both to the right and left.

Find the value of x. Write your answer as a fraction, if necessary. 4/9, 5/9, x

Answers

Answer:

can you give us the expression, please? we'll try to answer it ! but first you need to give us something to work with ':)

Answer:

0.12

Step-by-step explanation:


A mother is now nine times as old as her son. In four years' time she will be five times as old as her son.What are their present ages

Answers

Answer:

son = 4

mom=36

m = 9s

m + 4 = 5(s+4)

m + 4 = 5s + 20

9s + 4 = 5s + 20

4s = 16

s = 4

m = 36

Step-by-step explanation:

what is 46 divided by 532

Answers

Answer:

46 ÷ 532 is 0.08646

hope it's helpful

Answer:

0.08646616541

Step-by-step explanation:

46 ÷ 532 = 0.086466165

hope its helpful

mark me as brainlest

your friend says that The absolute value equation |3x+8|-9=-5 has no solution because the constant on the right of the equation is negative is your friend correct explain

Answers

Answer:

No, because if you simplify this equation, you will got |3x+8|=4, which is a positive number.

Step-by-step explanation:

I attached a gra of this equation belo, hope this help

Can someone please help me

Answers

Answer:

Mark me as a Brainliest pls

Step-by-step explanation:

we know that

the area of the rectangle = Length x Width

here

Area = 108.35 m²Length = 7.8 m

Find :-

The width measurement of the rectangle

Solution :-

Area of the rectangle = Length x Width

=> 108.35 = 7.8 x width

[tex]width \: = \frac{108.35}{7.8} \\ = > width \: = 13.891025641 \: m[/tex]

Conclusion :-

The width of the rectangle is 13.891025641 m option C) 13.89 m is the correct answer

Solve for x.
X
I need the. Value please

Answers

Answer:

45 degrees

Step-by-step explanation:

Hi there!

We're given that one of the triangle's exterior angles is 90 degrees. Using that, we can solve for the corresponding interior angle by subtracting 90 from 180 degrees:

180-90 = 90

Given that the two legs of this right triangle are of equal length, we know that the remaining two angles both measure x. Knowing that the sum of the interior angles in a triangle is 180 degrees, we can set up an equation:

x+x+90=180

2x=90

x=45

Therefore, x is 45 degrees.

In fact, any right triangle with legs of equal length will be a 45-45-90 triangle, meaning the other two angles measure 45 degrees.

I hope this helps!

Compare using <, >, or =.


3 7/8 ___ 3 5/6


=

<

>

please explain thank you

Answers

Answer:

3 7/8 > 3 5/6

Step-by-step explanation:

i have same question but on edge i tested see if the other answer was right and it was good job and good luck :p

If angle 1 and angle 2 are vertical angles, and the m<1 = 10x - 9 and m<2 = 4x + 15. Find the value for x.

Answers

Answer:

x = 4

Step-by-step explanation:

Vertical angles are equal.

m∠1 = m∠2

10x - 9 = 4x + 15

Add 9 to both sides

10x = 4x + 15 + 9

10x = 4x + 24

Subtract 4x from both sides

10x -4x = 24

6x = 24

Divide both sides by 6

x = 24/6

x = 4

please help i hate geometry

Answers

Answer:

a) 4/5 b) -3/4

Step-by-step explanation:

lines that are parallel have the same gradient. So the gradient is 4/5

Lines that are perpendicular have "opposite reciprocal" gradient: flip the sign, then flip the numerator and denominator (top/bottom). So the gradient  is -3/4

Answer:

a) 4/5 b) -3/4

Step-by-step explanation:

lines that are parallel have the same gradient. So the gradient is 4/5

Lines that are perpendicular have "opposite reciprocal" gradient: flip the sign, then flip the numerator and denominator (top/bottom). So the gradient is -3/4

(PLEASE HELP ASAP PLEASE EXPLAIN ALSO PLEASE AND THANK YOU)

Answers

Answer:

Step-by-step explanation:

Positive rational numbers will be in the right side of the number line.

Negative rational numbers will be in the right side of the number line.

18.256 will be lying in between 18.25 and 18.26

Which function represents this graph?
A f(x)==x-2
B f(x) = -x-2
C f(x)=-4x? - 2
D f(x)=4x-2

Answers

Answer:

A

Step-by-step explanation:

calculate the length of the legs of an isosceles triangle.The base is less than the other congruent legs by two units.The perimeter of the triangle is 22 meter .

Answers

Answer:

Sides = 8 each and base = 6

Step-by-step explanation:

Let congruent legs = x, then the base is x - 2 so,

P = x + x + (x - 2)

22 = 3x - 2

24 = 3x

8 = x (sides)

base = 8 - 2 = 6

PLEASE HELP ANSWER THIS THNAK YOU

Answers

Answer:

112 cm (red, 4)

Step-by-step explanation:

length = b

width = a

b = 7a

42 = b - a

42 = 7a - a

42 = 6a

a = 7          => b = 7a       b = 7*7 = 49

Perimeter = 2*(a+b)

= 2*(7+49)

= 2*(56)

= 112 cm

The new graph is the inverse of the time vs height graph, but I’d not a function. How would you restrict the domain on the original function to make it invertible?

Answers

Using inverse function concepts, it is found that the domains that make the function invertible are: [tex]t \in [0, 2.5][/tex] of [tex]t \in [2.5, 5][/tex].

-----------------------------------

A function is invertible if each output is related to only one value of the input.

-----------------------------------

In the graph given in this question, other than the maximum height at [tex]t = 2.5[/tex] seconds, all outputs are related to two input values.To be invertible, the domain has to be divided at the half-way point, either between 0 and 2.5 seconds, or between 2.5 seconds and 5 seconds. This way, each output will be related to only one input.

Thus, the domains that make the function invertible are: [tex]t \in [0, 2.5][/tex] of [tex]t \in [2.5, 5][/tex].

A similar problem is given at https://brainly.com/question/13160937

Given m || n, find the value of x and y.

Answers

Answer:

x = 60

y = 60

Step-by-step explanation:

To find y (y and 120 are supplementary angles):

y + 120 = 180

y = 180 - 120

y = 60

x = y (because of corresponding angles)

x = 60

Please help me with number 5.

Answers

Answer:

D

Step-by-step explanation:

multiply the packs with the amount of bottles in each one. then subtract the number you got when you multiplied 4x8. I'm not good at explaining but hope this helps

What is 8^2 + 15^2= c^2

Answers

Answer:

[tex]8^2\:+\:15^2=\:c^2[/tex]

c = 17

Step-by-step explanation:

This is the  Pythagorean theorem  

Answer:

c^2= 64 + 225

c^2=289

c= √289

c= 17

I hope it's helpful

Thank you !

Robert is buying tickets to a basketball game. Adult tickets cost $4 more than student tickets. He bought 5 adult tickets and 7 student tickets for a total of $104. How much does a student ticket cost?

Answers

Adult tickets cost $4 more than student tickets, if you know that Robert bought 5, then you can multiply 5x4. You can then subtract those $20 from the total of $104, which would bring you to a total of $84. Then you can add the the 5 adult tickets to the 7 student tickets, which would give you a total of 12 tickets. You can then do 84/12= 7 since the cost of every ticket is now equal. Add 4 to the 7 for the cost of the adult ticket. You now have $11 as the cost of an adult ticket and $7 as the cost of a student ticket. Plug everything in to 5a + 7s = 104 if you want to verify the answers. ( a=adult, s=student)

If it says product what does it mean? Does it mean addition subtraction equals division or multiplication?

Answers

Answer:

you have to give common from

Answer:

Multiplication

Step-by-step explanation:

A factor times a factor equals the product. The answer to a multiplication problem is called the product.

Find the length of the missing side ( nearest tenth

Answers

Answer:

43.4 yd

Step-by-step explanation:

[tex]45^{2}[/tex]-[tex]12^{2}[/tex]

2025-144=1881

[tex]\sqrt{1881}[/tex]

43.37049

43.4

When Ms. Perez has excellent service at a restaurant, the amount she leaves for a tip t is at least 20% of the cost of the meal c. Write a model representing the amount of the tip.

Answers

Answer:

t ≥ 0.2c

Step-by-step explanation:

Her tip is at least 20% of the cost of the meal, so her tip is greater than or equal to 20% of the cost of the meal

tip ≥ 20% of the cost of the meal

t ≥ 20% of c

Another way of writing "20% of c" is multiplying the two values, so we have

20% of c = 20% * c

t ≥ 20% * c

To convert from a percentage to a decimal, we can divide the percentage by 100. Here, we have

20% = 0.2

t ≥ 0.2 * c

100 POINTS AND CROWNED BRAINLIEST!!! PLS HELP ONLY 30 MINS LEFT!!

Determine whether each equation represents y as a function of x.
y= l 4-x l

Answers


To find the transformation, compare the equation to the parent function and check to see if there is a horizontal or vertical shift, reflection about the x-axis or y-axis, and if there is a vertical stretch.
Parent Function:
y
=
|
x
|
y
=
|
x
|
Horizontal Shift: Right
4
4
Units
Vertical Shift: None
Reflection about the x-axis: None
Vertical Compression or Stretch: None

Geometry question. Parallel lines. “Find value of x that will make A||B”

Answers

Answer:

x = 11

Step-by-step explanation:

These angles are alternate exterior angles which means they are equal to each other:

5x + 9 = 6x - 2

5x - 6x = -2 - 9

-x = -11

x = 11

Solve for x.
21)
60°
8x
80°

Answers

Answer:

x = 5

Step-by-step explanation:

Sum of angles = 180, so

60 + 80 + 8x = 180

140 + 8x = 180

8x = 180 - 140 = 40

x = 40/8 = 5

What is the relationship between the number of sides in a regular polygon and
number of lines of symmetry?

Answers

Answer:

Divide 360 by the difference of the angle and 180 degrees. For example, 360 divided by 15 equals 24, which is the number of sides of the polygon. Divide 360 by the amount of the exterior angle to also find the number of sides of the polygon.

plz help w maths lit​

Answers

Answer:

WHAT

Step-by-step explanation:

Order the following numbers from least to greatest. 4,-2,-3,5,-1

Answers

Answer:

-3,-2,-1,4,5

I really hope this helps you a lot!

Step-by-step explanation:

Answer:

-3,-2,-1,4,5..

Step-by-step explanation:

janh xD I urself ds

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