This is for my calculus class, these are review questions for an exam that we are preparing for. Any help would be appreciated!

1. The table below gives the velocity of a car over a 15-sec. interval. Use a right Riemann sum with n = 5 to estimate the distance travelled by the car in this time period. time (sec) 3 6 9 12 15 velocity (ft/s) 8 18 25 45 41 34 2. Evaluate S_, 15x + 3| dx by graphing the function and finding the area of the region(s) bounded by the function and the x-axis