Question

Use the correct formula to find the area of a circle if the diameter is 21 mi. Round to the nearest hundredths place. Use 3.14 for π
𝜋
.(1 point)
Responses

346.19 mi.2
346.19

mi.
2

346.19 mi squared

65.94 mi.2
65.94

mi.
2

65.94 mi squared

1,384.74 mi.2
1
,
384.74

mi.
2

1,384.74 mi squared

131.88 mi.2

Answer 1

Use A = πr^2. With diameter 21 mi, r = 10.5 mi.
A = 3.14 × (10.5)^2 = 3.14 × 110.25 = 346.185 → 346.19 mi^2 (rounded to the nearest hundredth).