239.2 is 23 % of what

Determine whether the samples are independent or dependent. upper a data set includes the morning and evening temperature for the lasta data set includes the morning and evening temperature for the last 90 days.90 days.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

1: 4 if the wew 35 surfboards at the beach how many were short boards?