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4 years ago

Do not multiply by pi. Just use the whole number and do not try to include pi in the

Mathematics

1 answer:

IrinaK [193]4 years ago

4 0

Answer:

Surface area = 1808.64in² and volume is 7234.56in³

Step-by-step explanation:

The figure above is a sphere, and it has a diameter of 24in

Radius = ?

Radius = diameter / 2

R = 24 / 2

R = 12in

Surface area of of sphere = 4πr²

Volume of a sphere = 4/3 πr³

π = 3.14

1. Surface area = 4 * 3.14 * 12²

Surface area = 4 * 3.14 * 144

Surface area = 1808.64in²

2. Volume of the sphere = 4/3πr³

Volume = 4/3 * 3.14 * 12³

Volume = 4/3 * 3.14 * 1728

Volume = 7234.56in³

The surface area of the sphere is 1808.64in² and the volume is 7234

56in³

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Pls can someone help me with math pls I’m this is my last points..

LiRa [457]

Answer:

Please read all of this! Underlined things are the answers. The area of the entire circle is 19.625

Step-by-step explanation:

(This is a circle so the middle line is the diameter. According to the attachment, the diameter is 5 cm. To find the area, we have to multiply π and the radius squared. The radius is half of the diameter.

5 ÷ 2 = 2.5

2.5² = 6.25

π = 3.14

3.14 x 6.25 = 19.625)

Ignore the top I just realized what I'm supposed to do but I left it there just in case you need help!

The right and left shaded regions areas are 6.28 each.

4 ÷ 2 = 2

2² = 4

3.14 x 4 = 12.56

Since this is a semi circle, we cut it in half.

12.56 ÷ 2 = 6.28

To find the top and bottom shaded region's areas, repeat the same steps.

3 ÷ 2 = 1.5

1.5² = 2.25

3.14 x 2.25 = 7.065

7.065 ÷ 2 = 3.5325

The areas of the the top and bottom shaded regions are 3.5325 each.

3 0

4 years ago

What is the volume of the sphere, rounded to the nearest cubic foot?

Zielflug [23.3K]

Given:

Radius = 5 ft

To find:

The volume of the sphere

Solution:

Volume of the sphere:

$$V=\frac{4}{3}\pi r^3$

$$V=\frac{4}{3}\times 3.142 \times 5^3$

$$V=523.66$

$$V=524$

The volume of the sphere is 524 ft³.

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3 years ago

Find the unit rate of 152 people for 5 classes

cluponka [151]

$unit\ rate=\frac{number\ of\ people}{number\ of\ classes}\\\\unit\ rate=\frac{152}{5}=30.4\frac{people}{class}\\\\
Unit\ rate \ is\ equal\ to\ 30.4\ people\ per\ class.$

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aivan3 [116]

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Stels [109]

The answer is B).

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