Pls answer for 50 make sure to take your time pls

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation