Is the order that I’m putting them in correct? If it is what are the answers to the others? It it’s wrong what is the correct order? Please help! Thanks! :) (These are PIECEWISE FUNCTIONS by the way)

Aman steps out of a plane at a height of 4,000m above the ground falls 2,000m very quickly and then opens his parachute and slowly falls the remaining 2000m to the ground what height above the ground would be the best choice for a reference point

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

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%