An airplane is preparing to land at an airport. It is 47.200 feet above the ground and is descending at the rate of 3,400 feet per minute.
At the same airport, another airplane is taking off and will ascend at the rate of 2,500 feet per minute.
When will the two airplanes be at the same altitude and what will that
altitude be? Use two other methods to solve the problem.
Explain which methods are easier to use and which are more difficult to use for the
situation.

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.

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?