41) you have a 40 day period two visits with +75 centimeter growth each 3 visits with +6 each in total 2*75+3*6=150+18=168 divide this by 40 days to get the average: 168/40=4.2 centimeters per day or 1.65 inches/day
42) 7x total 3x20 2x15 1x13 1x16
if you order these into a list: 13,15,15,16,20,20,20
the median is the middle value, in this case 16$ the mode is the most common value: 20$ which exists 3 times
