The value of r is 10 in the expression 100(r)t.
The given expression is,
100(5)2t t represents the amount of bacteria present, in grams.
t days after the initial population of bacteria is measured.
If the expression can be rewritten as 100(r)t.
That means,
the original expression is,
100(5)2t
= 100 (10) t
Comparing, simplified expression with rewritten expression.
So we get r = 10.
Therefore, the value of r is 10.
I hope this helped you and have a Merry Christmas!