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A dime has a diameter of 17.91 millimeters. What is the area of the face of a dime? Use 3.14 for ππ. Round to the nearest hundredth if necessary. 

 Apr 27, 2020
 #1
avatar+5 
+2

 

 

D/2=R

17.91/2=8.955

 

A=πr2

251.8029585=3.14*(8.955*2)

 

Answer:251.8 in^2 ( rounded to the nearest hundred

 

What I did:

Since you only gave the diameter of 17.91 I had to divide the diameter by 2 which gave me 8.955 (the radius). Then to get the area I had to first multiply 8.955 (the radius) by itself which gave me 80.192025. Then I had to take 80.192025 and multiply it by 3.14 (π) which gave me 251.8029585 in^2.

 

Shown in equation form:

17.91/2=8.955

8.955^2=80.192025

80.192025*3.14=251.8029585 in^2

 Apr 27, 2020
 #2
avatar+23710 
+1

Good work!     But the answer is in units of    mm2

ElectricPavlov  Apr 27, 2020

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