20. [0/1 Points] DETAILS PREVIOUS ANSWERS BERRAPCALC7 5.6.068. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 2 Find the area between the curve y = xex and the x-axis from x = 3 to x = 5. (Leave the answer in its exact form.) 0 X square units Need Help? __ 21. [0/1 Points] DETAILS PREVIOUS ANSWERS BERRAPCALC7 5.6.072. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 17 During an automobile sale, cars are selling at the rate of cars per day, where x is the number of days since the sale began. How many cars will be sold during the rst 8 days of the sale? (Round x + 1 your answer to the nearest whole number.) x cars Need Help? _ Submit