I need the answer for A & B Decide whether these situations are linear or expone

Question

I need the answer for A & B

Decide whether these situations are linear or exponential, and then write an equation using the given variables for each situati initial month. the total belonging to the cub for m months. a. A gym charges b THc, the active ingredient in marijuana, is said to have a halflife of about one day. That means, that each day, half of what is in the system will be gone. If someone ingests 3grams of THc, write an equation to represent M.the amount of marijuana in his system when he is tested d days

Explanation / Answer

A) fixed charge = $ 100 and mothly charges = $ 60

C(m) = 100 + 60m  

Its a linear function

B) half life = 1 day

Its an expnential decay equation :

k = 0.693/1 = 0.693 ; intial amt = 3 gm

M(d) = 3(e^-0.693d)

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