AP Physics 2.

i would say b) is your answer

sorry if im wrong

step-by-step explanation:

hello i might . what do you need.

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it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.