It’s simple math I’m just not very big brain

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

Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)

Which of these triangle pairs can be mapped to each other using a single translation? cof hn