Find the mean for the following frequency tables. Grade 49.5–59.5, 59.5–69.5, 69.5–79.5, 79.5–89.5, 89.5–99.5 Frequency 2, 3, 8, 12, 5

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct

Last week , donnell practiced the piano 3 hours longer than marcus . together, marcus and donnell practiced the piano 11 hours . for how many hours did each young man practiced the piano