Ahot air blloon descended 99.9 meters in 12 seconds what was the balloons average rate of descent in meters per second

The sum of two numbers is 86, and their difference is 20. find the two numbers

The area of square garden is 300m squared. how long is the diagonal?

Someone answer asap for ! 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.