In 2002 winter olympics, cartriona lemay doan won the 500-meter race. her winning time was 74.75 seconds. find hee average speed to the nearest tenth of a meter per second.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Is the square root of 4 plus the square root of 16 rational?

Need 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.