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.

easy math just plug in a and b

step-by-step explanation:

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

b

step-by-step explanation:

the word superfluous means unnecessary

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2