A ball is dropped from 20 feet above the ground . The function h(t) = - 16t ^ 2 + 20 , where represents the time in seconds, gives the height, in feet, of the ball above the ground. When will the ball be 10 feet above the ground?

If an athlete can bike 6 miles in 25 minutes, how many miles will he bike in an hour and half if he continues to bike at the same rate?

What is the approximate circumference of the circle shown below?

Needmax 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.