Mathematics, 11.04.2020 03:08 lavardamon123

The diameter of a coaster is 7 centimeters. What is the total area of five coasters? Round to the nearest hundredth if necessary.

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Answer from: ynclankaedon

The total areas of five coasters are 192 square centimeters, if the diameter of a coaster is 7 centimeter.

Step-by-step explanation:

The given is,

The diameter of a coaster is 7 centimeters

Step:1

Formula to calculate the area of circle,

$Area, A =\pi r^{2}$ ........................(1)

Where, r - Radius of circle

From given,

Diameter, d = 7 centimeters

Formula for radius,

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

$=\frac{7}{2}$

= 3.5

Radius, r = 3.5 centimeters

Equation (1) becomes,

$A= \pi (3.5)^{2}$

= (3.14)(12.25) (∵ $\pi =3.14$ )

A = 38.465 square centimeters

Step:2

Area of five coasters,

= No. of coasters × Area of a coaster

= (38.465 × 3.14 )

= 192.325

≅ 192 square centimeters

Result:

The total areas of five coasters are 192 square centimeters, if the diameter of a coaster is 7 centimeter.

Answer from: Quest

The answer is poppy pants69

Answer from: Quest

600,000,000,000, or 6e14

step-by-step explanation:

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