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3 years ago

What is the radius of a sphere whose surface area is 100 square centimeters?

Mathematics

1 answer:

professor190 [17]3 years ago

7 0

Answer:

Step-by-step explanation:

The formula for determining the surface area of a sphere is expressed as

Surface area = 4πr^2

Where

r represents the radius of the sphere

π is a constant whose value is 3.14

From the information given,

Surface area of the sphere = 100 centimeters ^2. Therefore,

100 = 4 × 3.14 × r^2

100 = 12.65r^2

r^2 = 100/12.65 = 7.9051

r = √7.9051

r = 2.81 centimeters

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Read 2 more answers

The diameter of the moon is about 3500 km. Approximate the surface area of the moon using the formula for the surface area of a

sleet_krkn [62]

Answer:

$3.8465 *10^7$ square kilometers

Step-by-step explanation:

The surface area of a sphere can be found using the formula $SA=4\pi r^2$ . Since the diameter is 3500 km then its radius is half of this. 3500 divided in two is 1,750 units. Substitute r=1,750.

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The surface area of the moon is about 38,465,000 square kilometers. Write this is scientific notation using base. $3.8465 *10^7$

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