The quadratic function h(t) = -16.1t^2+ 150 models a ball's height, in feet, over time, in seconds,
after it is dropped from a 15 story building.

From what height, in feet, was the ball dropped?

After how many seconds, rounded to the nearest hundredth, did the ball hit the ground?

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables