Question

57(1.31)^t interpret the meaning of the expression

A. The initial number of bacteria is 57 and the growth rate is 3.1% per hour

B. The initial number of bacteria is 57 and the growth rate is 31% per hour

C.the initial number of bacteria is 131 and the growth rate is 5.7% per hour

D.the initial number of bacteria is 131 and the growth rate is 57% per hour

Answer 1

B. The initial number of bacteria is 57 and the growth rate is 31% per hour

57 is the initial all by itself and 31 is the growth rate. Don't really know why and how to explain the Percentage application but I got the answer correct on my test so.................................

Answer 2

For this case we have an equation of the form:
y = A * (b) ^ t
Where,
A: initial amount
b: growth rate
t: time
We then have the following equation:
y = 57 (1.31) ^ t
The initial number of bacteria is 57 and the growth rate is 31% per hour.
Answer:
B. The initial number of bacteria is 57 and the growth rate is 31% per hour