You.
first answer choices: 18 20 37 48
second answer choices: 38 38.5 42 72
third answer choices: 26 and 32, 28 and 42.5, 29 and 42.5, 38.5 and 43
fourth answer choices: 9 13.5 26 38
fifth answer choices: interquartile range, median, lower and upper quartiles, range

range= 20   median= 38   lower quartile and upper quartile= 29 and 42.5

interquartile range= 13.5

Step-by-step explanation:

range= you take the biggest number and subract it from the smallest number.

median= you set the numbers to smallest to biggest then go in from the left and right moving both fingures at once till you get to the middle.

Lower quartile= exclude the medain and average the 4 numbers

Upper quartile= exclude the medain and average the 4 numbers

interquartile range= subract 29 from 42.5

range (i think)

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two