LPIII u. Lleally; ME If units are given in the problem, make sure you give them in your answer. Answer the Question Be very careful to answer the question asked. If you're asked to find the points of intersection between y: x2 and y =cosx, then {x = .82413, .82413} is the wrong answer! The correct answer is: points (-.82413, .67919) and (.82413, .67919). Formulas Here is a short list of area and volume formulas that you might need: For a circle of radius r: Area = mg, Circumference =2nr. 4 For a sphere of radius r: Volume = [Ejnr3, Surface Area = 4mg. For a right circular cylinder with radius r and height h: Volume = nrzh, Surface Area = 2nrk + 2m"2 . 1 For a right circular cone with radius r and height h: Volume =[]nr2h. For a 2-liter bottle of cola: Volume=2 liters. section. If you're taking the unproctored version of the test, continue with the next question.) 1. Measurements of a lake's width were taken at 15-foot intervals, as shown: 0 15 30 45 60 75 90 105 120 (( x ) 0 15 18 20 19 23 24 22 12 Estimate J f(x)dx with n = 4, using each of the following methods: A. Left-hand approximation B. Right-hand approximation