Please help I need to hurry and get my missing assignments done.

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.

Askateboard ramp is in the shape of a right triangle what is the height of the ramp

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?