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?

Answer 1

Answer: There are 1233.55 bacteria on day 7.

Explanation:

Since we have given that

`y=79.31(1.48)^x`

Here, x represents the number of days.

y represents the number of bacteria.

We need to find the number of bacteria on day 7.

So, we put x = 7 as there are 7 days given.

So, our equation becomes,

`y=79.31(1.48)^7\\\\y=1233.55`

Hence, there are 1233.55 bacteria on day 7.

Answer 2

1234

Explanation:

Put the number in the expression and do the arithmetic.

y = 79.31(1.48^7) ≈ 79.31 × 15.554 ≈ 1233.56 ≈ 1234