Question

How much can be placed on a circular serving tray that has a diameter of 18 in? Leave answer in terms of pi. A) 9π in2 B) 18π in2 C) 36π in2 D) 81π in2

Answer 1

The answer is D

Explanation:

Answer 2

For this case we have that by definition, the area of a circle is given by:

`A = \pi r ^ 2`

Where,

• r: radius of the circle.

We have then that the radio is given by:

`r = \frac {d} {2}`

Where,

• d: diameter of the circle

Substituting values we have:

`r = \frac {18} {2}\\r = 9`

Then, calculating the area we have:

`A = \pi (9) ^ 2\\A = 81 \pi`

Answer:

on a circular serving tray that has a diameter of 18 in can be placed:

`A = 81 \pi`