Learning thoery students in a mathmatics class were given an exam and than retested monthly with equivalent exams. the average score s (on a 100-point scale) for the class can be modeled by s = 80 - 14 in(t + 1),0 ≤ t ≤ 12, where t is the time in months.
(a) what was the average score on the orignal exam?
(b) what was the average score after 4 month?
(c) after how many months was the average score 46?

Answer

i doubt you still need the answer so fanks

the answer is true.

step-by-step explanation:

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)