Curing times in days (x) and compressive strengths in mpa (y) were recorded for several concrete specimens. the means and standard deviations of the x and y values were x⎯⎯ = 5, sx = 2, y⎯⎯ = 1350, sy = 100. the correlation between curing time and compressive strength was computed to be r = 0.7. find the equation of the least-squares line to predict compressive strength from curing time. round the answers to two decimal places.

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need

Even if a person is in very good shape, applying to be a police officer requires commitment to fitness. applicants must pass a physical fitness test. in order to prepare for the test, janet purchases an activity tracker to court her steps. her goal is to walk 10,000 steps each day. she measures heard average step length to be 30 inches. play janet runs, her average steps length increases to 36 in. how many steps would she have to take to run 1 mile 50280 round to the nearest step

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.