Question

The growth of a new strain of bacteria is represented by y = 79.31(1.48)x, where x represents the number of days and y represents the number of bacteria. Which is the best prediction for the number of bacteria on day 7?

A. 821 bacteria
B. 1234 bacteria
C. 1819 bacteria
D. 117 bacteria

Answer 1

1819 because it makes more sense than the other ones

Answer 2

821 bacteria

Explanation:

You have that the growth of bacteria is represented by:

y = 79.31(1.48)x

N° Bacteria=79.31(1.48)(N° Days)

If you know that N° Days is 7, you need to replace x=7 in the Equation given.

Then:

N° Bacteria=79.31(1.48)(N° Days)

N° Bacteria=79.31(1.48)(7)

N° Bacteria=821,65