All categories

2 years ago

PLZ HELP QUICK WILL MARK BRAINLIEST

Mathematics

1 answer:

natima [27]2 years ago

7 0

Answer:

Step-by-step explanation:

12.

the formula for the volume of a cone is V=1/3hπr²

549.5 = 1/3(21)(3.14)(x)^2

549.5 = 7(3.14)(x)^2

549.5 = 21.98(x)^2

divide by 21.98 on both sides

25 = (x)^2

sqrt 25 = sqrt x^2

5 = x

13.

the formula for the volume of a sphere is V=4/3πr^3

v=4/3(3.14)9^3

v=4/3(3.14)729

v=(4.186)729

v=3052.08

14.

the formula for the volume of a sphere is V=4/3πr^3

523=4/3(3.14)r^3

523=(4.186)r^3

divide by 4.186 on both sides

124.92=r^3

cube root on both sides

4.998=r

round

5=r

Please mark brainliest this took me a while

You might be interested in

Whats the formula to Reed's fence is 96 feet long how many yards long is Reed's fence

Dmitry [639]

If there are 3 feet per yard, then all you have to do is take the 96 feet and divide by 3, this gives you 32 yards.

If you have any questions please let me know, other wise take care. (:

8 0

3 years ago

Evaluate the function. f(x) = -2x2 + 7 Find f(-5)

Alla [95]

-2(-5)^2 + 7
-2 • 5^2 + 7
-2 • 25 + 7
-50 + 7
-43

6 0

3 years ago

Use the figure at the right to answer the following questions.

Lisa [10]

<h3>Answers:</h3>

1. Name all the line segments.

Ans.  PL, LA, AY, YS,

2. How many line segments were formed?

Ans.  4 (four)

3. Name all rays

Ans. AM, AN

4. How many rays were formed?

Ans. 2 (two)

5. Name the opposite rays :

Ans. AM, AN

6. Is point A between MN ?

Ans. Yes

7. Find the line segments and rays formed by 5 points.

Ans. 

Line segment = PL, LA, AY, YS,
Rays = AM, AN

<h3>Hope it helps you.</h3>

7 0

2 years ago

Tanner cycled 8 miles in 20 minutes .What is the constant of proportionality based on the situation

solmaris [256]

The constant of proportionality based on the situation is 0.4

Step-by-step explanation:

Tanner cycled 8 miles in 20 minutes

We need to find the constant of proportionality based on the situation

1. The distance is proportion to the time, because the distance and

the time increased together

2. If the distance d and the time is t, then d ∝ t

3. The equation of the direct proportion is d = k t, where k is the

constant of proportionality

∵ d = k t

∵ d = 8 miles

∵ t = 20 minutes

- Substitute these values in the equation above

∴ 8 = k (20)

- Divide both sides by 20

∴ k = 0.4

The constant of proportionality based on the situation is 0.4

Learn more:

You can learn more about proportionality in brainly.com/question/10708697

#LearnwithBrainly

7 0

3 years ago

I did 3 over 7 then 8 over x. I'm getting decimals. ‍♀️

julia-pushkina [17]

Answer:

The length of side b is 9.

Step-by-step explanation:

Triangles are similar if they have the same shape, but can be different sizes.

When two figures are similar, the ratios of the lengths of their corresponding sides are equal.

If you know that two objects are similar, you can use proportions and cross products to find the length of an unknown side. We know that the triangle $ABC$ is similar to the triangle $XYZ$ . Therefore the following relation must be true:

$\frac{AB}{AC} =\frac{XY}{XZ}$

We know that side $AB$ is equal to 8, side $AC$ is equal to b, side $XY$ is equal to $2\frac{2}{3}$ , and side $XZ$ is equal to 3.

Substituting these values into the above relation and solving for b we get that:

$\frac{8}{b} =\frac{2\frac{2}{3} }{3}\\\\\mathrm{Convert\:mixed\:numbers\:to\:improper\:fractions}:\quad 2\frac{2}{3}=\frac{8}{3}\\\\\frac{8}{b}=\frac{\frac{8}{3}}{3}\\\\8\cdot \:3=b\frac{8}{3}\\\\24=b\frac{8}{3}\\\\8b=72\\\\b=9$

5 0

3 years ago