If caffeine reduces by about 10% per hour, how many hours h does it take for the amount of caffeine in a body to
reduce by half (round up to the next hour)?

7 hours

Step-by-step explanation:

Since, the final amount of caffeine formula would be,

Where,

P = Initial value,

r = rate per period,

t = number of periods,

Here, r = 10% = 0.10, t = h, A =

Taking log both sides,

Hence, after 7 hours the amount of caffeine in a body to  reduce by half.

what?

step-by-step explanation:

sine

step-by-step explanation: