Answer:
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.
Answer:
little more points
Step-by-step explanation:
Separate this into, instead of 4*362, 4*300+4*60+4*2, all of which are much easier to solve than the former problem.
4*300=1200
4*60=240
4*2=8
Add these together now!
1200+240+8=1448
Hope this helps!
The X=1 is Y= 5
The x=0 is Y= 8
The x=3 is Y= -1