400=-16t^2+400

Solution for 400=-16t^2+400 equation:

Simplifying
400 = -16t2 + 400

Reorder the terms:
400 = 400 + -16t2

Add '-400' to each side of the equation.
400 + -400 = 400 + -400 + -16t2

Combine like terms: 400 + -400 = 0
0 = 400 + -400 + -16t2

Combine like terms: 400 + -400 = 0
0 = 0 + -16t2
0 = -16t2

Solving
0 = -16t2

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '16t2' to each side of the equation.
0 + 16t2 = -16t2 + 16t2
Remove the zero:
16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
16t2 = 0

Divide each side by '16'.
t2 = 0

Simplifying
t2 = 0

Take the square root of each side:
t = {0}