Gina let three children pick a toy at target. Annie wanted a doll for 12$ Mandys game cost16$ an Noah’s action figure was 8$ Gina the cashier 45$ how much change did she get back

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *