A student solved an equation for an unknown value of n as 0=0. Which set represents all of the possible values of n

Interpret the following expression (5y^2-7)^3/(2y)^2

Me i'm timed right now! there's 4 answer

Write a ratio and a percent for the shaded area. it is 3x3 and 5x5 grid there is 6 shaded out of a. 6 over 25 , 30% b. 3 over 50 , 6% c.6 over 25 , 24% d. 3 over 10 , 30%