It's finals week! So in my Calculus 1 class, we have been doing lots of review packets. Below are a few questions that I could use more information to understand! Anything helps!!!

11.A 10-ft. ladder is sliding down a wall. If the top of the ladder is sliding down the wall at a rate of 0.5 Wsec, how quickly is the bottom of the ladder moving away from the wall when the top of the ladder is 6 feet from the ground? 12.The table below shows the velocity of a car in mph after t hours. Use a left Riemann sum with n = 6 to estimate the distance travelled in the first three hours. time (hr) 0 0.5 | 1 | 1. |velocity(mph) 57 58 | 60 | 6