Strep throat is caused by streptococcus bacteria. the amount of bacteria multiplies at a rate of 10^13 per 10^2 hrs.
what is the average growth of bacteria per hour? ?

Bacteria multiplies at a rate of per  hours.

In extended form, we get:

Rate of 10000000000000 per 100 hours.

Then for 1 hour, we only divide 10000000000000 by 100.

Thus we get that the average growth of bacteria per hour is 100000000000, or when writing it in exponential terms, .

Maybe the answer is 20mm. all i really did was just multiply, which is obvious.