Question

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

Answer 1

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

Answer 2

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.................................