Question

A population of flies grows according to the function p(x) = 2(4)x, where x is measured in weeks. A local spider has set up shop and consumes flies according to the function s(x) = 2x + 5. What is the population of flies after two weeks with the introduced spider?

Answer 1

answer is 23

Explanation:

Answer 2

well, the spider is "consuming flies", so we'd have to subtract those flies the spider is picking up, that is 2x + 5, x = weeks.

now, after two weeks, x = 2


`\bf P(x)-s(x)\implies 2(4)^2-[2(2)+5]\implies 32-9`