Answer:
[tex]17.8\ ounces[/tex]
Step-by-step explanation:
we know that
A 12-ounce Pepsi contains 54 mg of caffeine
A can of Red Bull (8.2 oz) has 80 mg of caffeine
so
using proportion
Find out how many ounces of Pepsi do you need to drink to get 80 mg of caffeine
Let
x ----> the number of ounces of Pepsi
[tex]\frac{12}{54}\frac{ounces}{mg}=\frac{x}{80}\frac{ounces}{mg}\\\\x= 80*12/54\\\\x= 17.8\ ounces[/tex]