Question

The area of a circle with diameter 5 inches 

Answer 1

19.63

Explanation:

area =
`\pi r^(2)`

where r is the radius.

The diameter is double the radius.

So divide the diameter by 2 to find the radius.

5/2 = 2.5

Now plug into the area formula and solve.

area =
`\pi 2.5^(2)`

area =6.25
`\pi`

area = 19.6349540849

The problem didn't say anything about what to round to. If you round to the hundredths place, this would be 19.63.