3 years ago

Can someone please help

Mathematics

2 answers:

Juliette [100K]3 years ago

5 0

Answer:

201.06

Step-by-step explanation:

3.14 * 8^2= 201.06

(pi * radius ^ squared)

wlad13 [49]3 years ago

4 0

201.06 is the answer

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The faces of triangular pyramid have a base of 5cm and a height of 11cm what is the lateral area of the pyramid

prisoha [69]

Answer:

55cm

Step-by-step explanation:

11 x 5 = 55, so the area of the pyrmid is 55cm.

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3 years ago

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Andrews [41]

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3 years ago

A toy ball in the shape of a sphere expands and contracts. When it is completely closed, it has a diameter of 12.5 inches.Find

lana [24]

The volume of the sphere is $1022.65 \ in^3$

Explanation:

Given that the diameter of the toy ball is 12.5 inches

We need to determine the volume of the toy ball.

The radius of the toy ball is given by

$r=\frac{d}{2}$

$r=\frac{12.5}{2}$

$r=6.25 \ in$

Thus, the radius of the toy ball is 6.25 in

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Substituting the values, we get,

$V=\frac{4}{3} \pi(6.25)^{3}$

Multiplying, we get,

$V=\frac{976.5625 \pi}{3}$

Substituting $\pi=3.14$ , we have,

$V=\frac{976.5625 (3.14)}{3}$

Simplifying, we get,

$V=1022.65 \ in^3$

Thus, the volume of the sphere is $1022.65 \ in^3$

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3 years ago

Join this we just talk and chill if you bored and got nothing to do

Alborosie

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Step-by-step explanation:

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3 years ago

If the diameter of a hockey rink is 250 ft what is the surface area of the sphere?

Lady bird [3.3K]

Answer:

62,500 pi

Step-by-step explanation:

diameter = radius + radius

d = 2r

r = d/2

A = 4pi r^2

= 4 pi (d/2)^2

= 4pi d^2/4

= 4pi* 250^2/4

= 4pi * 62,500/4

= 4pi * 15625

= 62,500 pi

7 0

3 years ago