Really need with this question ! the quadratic relation h=-5t^2+80t models the height, h in meters, that an object projected upward from the ground will reach in t seconds following its launch . what is the maximum height that this object will reach?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

How to find the exponential function y=ca^x, with points (1,2) and (2,1)