Estimate the area under the graph of f (x) = x* + 3x from x = 1 to x = 7 using the areas of 3 rectangles of equal width, with heights of the rectangles determined by the height of the curve at (a) left endpoints ANSWER: 436 E (b) right endpoints ANSWER: 664 Help Entering Answers See A Similar Example (PDF) Preview My Answers Submit Answers Show me another Results for this submission Entered Answer Preview Result 436 436 incorrect 664 664 incorrectThe goal of this problem is to overestimate and underestimate the area under the graph of f(x) =-12 + 8x - x- from x = 2 to x = 6 using an "upper sum" and "lower sum" of areas of 4 rectangles of equal width. (a) Overestimate using an upper sum ANSWER: E (b) Underestimate using a lower sum ANSWER: EThe following table gives the velocity v(t) (in ft/s) at different instances of time t (in s) of a particle moving along a horizontal axis. t 0 3 6 9 12 15 v(t) 59 58 55 48 34 6 Estimate the distance traveled by the particle between t = 0's and t = 15 s using 5 time intervals of equal length with (a) left endpoints Estimated distance = ft. (b) right endpoints Estimated distance = ft.Estimate the area under the graph of f (x) = cos(xx) from x = -_ to x = = using the areas of 3 rectangles of equal width, with heights of the rectangles determined by the height of the curve at (a) left endpoints ANSWER: (b) right endpoints ANSWER: E