## Mathematics

Instructions:Select the correct answer from each drop-down menu.

Gary is testing a river water sample in his lab. Initially, there are 64 bacteria in the river water sample. The number of bacteria after 3 hours can be calculated using the expression shown below.

Use the given expression to complete the statements.

3

64(1.12)

The quantity that represents the initial number of bacteria is 64 3 1.12 .

The quantity that represents the rate at which the number of bacteria is increasing is A. 0.12 B. 1.12 C. 3 12 , which means the growth rate percentage for the bacteria is A. 0.12 B. 112 C.1.12 D. 12 3 %.