Caffeine has a half-life of five hours in a healthy adult. This means that after five hours after it is consumed, only half of the caffeine remains. A popular energy drink contains 80 mgs of caffeine per each 8.4 ounce serving. You decide to try a single-serving can. 1. Find the number of mg of caffeine in your body for the first five half-lives and the percentage of caffeine in your body for the first five half-lives.

25 questions , because they start with 100.  

350-100=250 .  

. 250/10=25

step-by-step explanation:

first take off 100, then what x 10 = 250? that is your answer. (25)

answer: ♡♡♡♡♡♡♡♡♡♡

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.