13 5 points The rate r t upon the amount of time t in hours that has elapsed since they r t dt 0 035 JO What is the percent blood alcohol concentration of the adult 3 hours after finishing drinking if their blood alcohol concentration was 0 079 percent at the time they finished their last drink Include units in your answer Answer 14 5 points Consider the functions f x x x 7 and g x 8x 7 a Find the intersection points of these two functions by setting f x g x and solving for x Answer b Express the area trapped between these two functions as a definite integral and then use a calculator to evaluate this definite integral Give your answer to four decimal places