Question

Using Python: Assuming that: Caffeine is absorbed into the body immediately. Once absorbed, 20% is eliminated from the body each hour. Write a program that asks the user for the amount of coffee consumed, in milligrams (mg), and then compute (and output) the following: The number of hours required until there is less than half of the caffeine left in the body The amount of caffeine left in the body after 8 hours Then, assuming that the person drinks a cup of coffee at 8 am and then drinks a cup of coffee at the end of each hour until 6 pm, compute and output the following. How much caffeine will there be in the body at the end of the 10 hours? A sample run would be as follows. Enter the amount of caffeine in mg: 200 Less than half of it will be left after 4 hours. The amount of caffeine left in the body after 8 hours: 33.55 mg The amount remaining after 10 hours: 914.10 mg

Answer 1

1.CODE:Below is the code in python

coffee = int(input("Enter the amount of  coffee consumed in mg: "))
remaining=coffee
hr=1
while(coffee/2 <= remaining*0.80):
    remaining=remaining*0.80
    hr=hr+1

for i in range(0,8):
    final=coffee*0.80
    coffee=final

intake=coffee
for i in range(0,10):
    intake= coffee+.80*intake


print("The number of hours required until there is less than half of the caffeine left in the body:",hr)
print("The amount of caffeine left in the body after 8 hours:",final)
print("The amount remaining after 10 hours:",intake)


2.Explanation
coffee variable will hold the value of input by the user
hr is the hour variable which will indicate the hours taken to half the input variable

while(coffee/2 <= remaining*0.80): This will determine the amount of hours until the input caffein becomes half.

after every hour 20% is absorbed by body so remainig values is 80% so in first hour 80% is remaining ,in second hours 64% is remainig(20% of 80%) and so on

for i in range(0,8):
    final=coffee*0.80
    coffee=final

This part will determine the amount left after 8 hours, i have run a loop from 0 to 8 ,after every hour the amount becomes 20% of previous value and final value will store the result

intake=coffee
for i in range(0,10):
    intake= coffee+.80*intake

This is an interested part, after every hour the person drinks one cup of coffee, so at 8 AM he drinks coffee

the amount remaining in body is 80% (as 20 % is absorbed by body).At 9 AM he drinks another cup of coffee

So at 9 AM total caffein amount is 80% of coffee he took at 8AM +the amount he took at 9 AM

and so on.