Answer Happy

12. [-/6.66 Points] DETAILS TANAPMATH7 11.5.060. MY NOTES ASK YOUR TEACHER Seat Belt Use Suppose the percentage of drivers using seat belts from 2001 through 2009 is modeled by the function f(t) = 75.5(t + 1)0.055 where t is measured in years, with t = 0 corresponding to the beginning of 2001. What was the average percentage use of this device over the period from the beginning of 2001 through the end of 2009 (t = 9)? (Round your answer to one decimal place.) 13. [-/6.76 Points] DETAILS TANAPMATH7 11.6.052. MY NOTES ASK YOUR TEACHER Effect of TV Adverstising on Car Sales Carl Williams, the proprietor of Carl Williams Auto Sales, estimates that with extensive television advertising, car sales over the next several years could be increasing at the rate of 3e⁰.3t thousand cars/year, t years from now, instead of at the current rate of 3 + 0.5t3/2 thousand cars/year, t years from now. Find how many more cars Carl expects to sell over the next 7 years by implementing his advertising plans. (Round your answer to the nearest whole number.) cars