Question

function f(x) represents the population of bacteria x hours after 9am what does f(2)-f(1)represent

Answer 1

f(2) describes the population of bacteria 2 hours after 9 AM, and f(1) describes the population of bacteria 1 hour after 9 AM. This means that f(2) - f(1) = f(1), so it represents the population of bacteria 1 hour after 9 AM.

Answer 2

The function f(2) - f(1) represents the difference between the amount of bacteria present at 11 am and 10 am.

Given the function ; f(x) :

• x = number of hours after 9am

For the function, f(2)

• x = 2 ; 2 hours after 9am = 9am + 2 = 11 a.m

Hence, f(2) = population of bacteria at 11 a.m

For the function, f(1)

• x = 1 ; 1 hour after 9am = 9am + 1 = 10 a.m

Therefore,

f(2) - f(1) = population at 11am - Population at 10 am

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