130=.8t^2

Solution for 130=.8t^2 equation:

Simplifying
130 = 0.8t2

Solving
130 = 0.8t2

Solving for variable 't'.

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

Add '-0.8t2' to each side of the equation.
130 + -0.8t2 = 0.8t2 + -0.8t2

Combine like terms: 0.8t2 + -0.8t2 = 0.0
130 + -0.8t2 = 0.0

Add '-130' to each side of the equation.
130 + -130 + -0.8t2 = 0.0 + -130

Combine like terms: 130 + -130 = 0
0 + -0.8t2 = 0.0 + -130
-0.8t2 = 0.0 + -130

Combine like terms: 0.0 + -130 = -130
-0.8t2 = -130

Divide each side by '-0.8'.
t2 = 162.5

Simplifying
t2 = 162.5

Take the square root of each side:
t = {-12.747548784, 12.747548784}