Round to the nearest thousandth as well

You invested $5000 between two accounts paying 4% and 9% annual interest, respectively. if the total interest earned for theyear was $350, how much was invested at each rate? $was invested at 4% andwas invested at 9%.

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

Which answer goes into the box? (90° clockwise rotation, 90° counter clockwise rotation, translation, or glide reflection)