Choice B would be the correct answer. I hope that helps! :D
Answer:
It takes him 7 minutes to do 21 problems
Step-by-step explanation:
15/5=3
He did 21 problems
So you would then do...
21/3=7
Answer:
24
Step-by-step explanation:
I believe the answer you are looking for is:
<span>t = 0.002n</span>
