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The question is incomplete! Complete question along with code and step by step explanation is provided below.
Question:
Caffeine levels A half-life is the amount of time it takes for a substance or entity to fall to half its original value. Caffeine has a half-life of about 6 hours in humans. Given caffeine amount (in mg) as input, output the caffeine level after 6, 12, and 18 hours. Output each floating-point value with two digits after the decimal point, which can be achieved as folllows: printf("%0. 21f", yourValue); Ex: If the input is 100 the output is: After 6 hours: 50.00 mg After 12 hours: 25.00 mg After 18 hours: 12.50 mg
Explanation:
#include <stdio.h>
int main()
{
float caffeine; // variable to store the amount of caffeine from the user
float after_6, after_12, after_18; // variables to store the results
printf("Enter caffeine amount in mg: ");
scanf("%f", &caffeine); //ask user to input the amount of caffeine
// calculate the half life by dividing the caffeine amount by 2
after_6=caffeine/2;
after_12=after_6/2; // divide the current half life (after_6) again by 2
after_18=after_12/2; // divide the current half life (after_12) again by 2
// print the half life after 6, 12, and 18 hours
// ".2" is used to display 2 digits after the decimal point
printf("after 6 hours in mg: %.2f", after_6);
printf("\nafter 12 hours in mg: %.2f", after_12);
printf("\nafter 18 hours in mg: %.2f", after_18);
return 0;
}
Output:
Enter caffeine amount in mg: 200
after 6 hours in mg: 100.00
after 12 hours in mg: 50.00
after 18 hours in mg: 25.00
Answer:
Input: 100
caffeine_mg = float(input())
after_6 = caffeine_mg / 2
after_12 = after_6 / 2
after_24 = after_12 / 4
print(f'After 6 hours: {after_6:.2f} mg')
print(f'After 12 hours: {after_12:.2f} mg')
print(f'After 24 hours: {after_24:.2f} mg')
Explanation:
#Input
100
#define caffine mg with float input // for decimal
caffeine_mg = float(input())
#define after 6, after 12, after 24 divided by value
after_6 = caffeine_mg / 2
after_12 = after_6 / 2
after_24 = after_12 / 4
#print format.str { after x: . value } mg
print(f'After 6 hours: {after_6:.2f} mg')
print(f'After 12 hours: {after_12:.2f} mg')
print(f'After 24 hours: {after_24:.2f} mg')
