Whats 16x5 This Is a trick to get pass mods

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?