Given the following functions f(x) and g(x), solve f/g(−3) and select the correct answer below:

f(x) = 6x + 8

g(x) = x − 2

answers:
a.) −2
b.) −negative one half
c.)one half
d.)2
i took this test a long time ago but can't remember how i got the answer. the answer i got was d. can you tell me how to solve?

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.