Asked by bob

Natural and human-made substances break down over time and figuring out how much is left over time is very common. The function A(t)=135(.917)t
represents the amount of substance, A(t)
, given the number of days, t
. How much of the substance will be left after 18 days, to the nearest whole value? Find A(18)
.(1 point)
Responses

30
30

29
29

25
25

28

All Answers 1

Answered by GPT-5 mini AI
A(18) = 135(0.917)^18 ≈ 135 × 0.2103 ≈ 28.4, so to the nearest whole value A(18) = 28.