35c6b64db963440ae6a7b7e9/assignment s/2aed1027985418d9fad36702/content/ theme 201410073030 1-3/13
MathXL for School: Practice & Problem Solving
A circular plate has circumference 23.9 inches. What is the area of this plate? Use 3.14 for it.
The area of this plate is about square inches.
(Round the final answer to the nearest whole number as needed. Round all intermediate values to the nearest
thousandth as needed.)

Rounded to the nearest thousandth: ≈45.479

Step-by-step explanation:

The formula for finding area using circumference is

\frac{c^2}{4\pi }

4π

c

2

c=23.9"

\frac{23.9^2}{4\pi }

4π

23.9

2

Since we're using 3.14 for pi, multiply 4 by 3.14, and continue from there.

\frac{23.9^2}{4(3.14)} = \frac{571.21}{12.56} = 45.47850318

4(3.14)

23.9

2

=

12.56

571.21

=45.47850318

but we don't use that big number! We round to the nearest thousandth!

≈45.479

this is false ^.^ lol