Fill in the table using this function rule y=3x-3

Can someone me and do the problem plz so i can understand it more better

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

Maci and i are making a small kite. two sides are 10". two sides are 5". the shorter diagonal is 6". round all your answers to the nearest tenth. 1. what is the distance from the peak of the kite to the intersection of the diagonals? 2. what is the distance from intersection of the diagonals to the top of the tail? 3. what is the length of the longer diagonal?