Lin runs 5 laps around a track in 8 minutes. If Lin runs 21 laps at the same rate, how long does it take her?
a) 13.13 minutes
b) 441 minutes
c) 33,6 minutes
d) 1.6 minutes

It will take 25.2 minutes to complete 21 laps.

Step-by-step explanation:

The rate of covering 5 laps is:

v = 6/5

Therefore, the time taken to cover 21 laps is:

t = 21/v

t = 21*6/5

t = 25.2

Hence, it will take 25.2 minutes or 25 minutes 12 seconds for Lin to complete 21 laps.  

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

aloha~! my name is zalgo and i am here to you out on this amazing day. to answer your question, yes, nonzero numbers can have a greatest common factor and that would be 1. still don't get it? let me considering every number is divisible by 1 and hence every number has 1 as a factor of theirs. so, if 2 nonzero numbers didn't share any gcf (greatest common factor), they would still have a factor in common and that would be 1.

i hope that this ! : p

"stay and stay proud! " - zalgo

(by the way, do you mind marking me as brainliest? i'd greatly appreciate it! mahalo! x3)