Step-by-step explanation:
<u>Formula:</u>

r represents the radius.
The radius is 1/2 of the diameter.
Since 1/2 of 16 is 8, 8 is our radius.
<u>Substitute:</u>

<u>Solve:</u>


A) I believe but you might not want to go with it cause I'm not good at math AT ALL:)
Answer: D
Step-by-step explanation:
Idk i just got it wrong on usatestprep and it said that the answer is D. so have at it.
Answer:
tbh i just used another app to help me help you i hope this is right the app i used is always spot on with answers :)