To the nearest tenth, find the circumference and the area of the target. $a = 9 \mathrm { in }$
A) $56.5 \mathrm { i } .$ , $254.5 \mathrm { in } ^ { 2 }$
B) $56.5 \mathrm { i } .$ , $508.9 \mathrm { in } ^ { 2 }$
C) $28.3 \mathrm { in } .$ , $508.9 \mathrm { in } ^ { 2 }$
D) $28.3 \mathrm { in } .$ , $254.5 \mathrm { in } ^ { 2 }$

Question

To the nearest tenth, find the circumference and the area of the target.  $a = 9 \mathrm { in }$
A) $56.5 \mathrm { i } .$ , $254.5 \mathrm { in } ^ { 2 }$ 
B) $56.5 \mathrm { i } .$ , $508.9 \mathrm { in } ^ { 2 }$ 
C) $28.3 \mathrm { in } .$ , $508.9 \mathrm { in } ^ { 2 }$ 
D) $28.3 \mathrm { in } .$ , $254.5 \mathrm { in } ^ { 2 }$

Quizplus · Accepted Answer

The circumference of a circle is given by the formula:

$C = 2\pi r$

where $r$ is the radius.

In this case, $r = 9$ in, so

$C = 2\pi(9) \approx 56.5$ in (rounded to the nearest tenth)

The area of a circle is given by the formula:

$A = \pi r^2$

In this case, $r = 9$ in, so

$A = \pi(9^2) \approx 254.5$ in$^2$ (rounded to the nearest tenth)

Therefore, the answer is choice A.

To the Nearest Tenth, Find the Circumference and the Area a=9ina = 9 \mathrm { in }a=9in

To the Nearest Tenth, Find the Circumference and the Area $a = 9 \mathrm { in }$