What goes in the middle box to get 1/5? Help!

Identify the parent function that can be used to graph the function f(x)= (1/4x)^3

Which best explains why this triangle is or is not a right triangle ?

Find the measure of angle y. round your answer to the nearest hundredth. ( type the numerical answer only) a right triangle is shown with one leg measuring 5 and another leg measuring 14. an angle across from the leg measuring 5 is marked y degrees. numerical answers expected!