Solve =1/2(8)(9)=36ft^2

$$= \frac { 1 } { 2 } ( 8 ) ( 9 ) = 36 ft ^ { 2 }$$

Solve for f

$$f=\frac{1}{t^{2}}$$

$$t\neq 0$$

Steps for Solving Linear Equation

Multiply \frac{1}{2} and 8 to get 4.

$$4\times 9=36ft^{2}$$

Multiply 4 and 9 to get 36.

$$36=36ft^{2}$$

Swap sides so that all variable terms are on the left hand side.

$$36ft^{2}=36$$

The equation is in standard form.

$$36t^{2}f=36$$

Divide both sides by 36t^{2}.

$$\frac{36t^{2}f}{36t^{2}}=\frac{36}{36t^{2}}$$

Dividing by 36t^{2} undoes the multiplication by 36t^{2}.

$$f=\frac{36}{36t^{2}}$$

Divide 36 by 36t^{2}.

$$f=\frac{1}{t^{2}}$$

Solve for t

$$t=\frac{1}{\sqrt{f}}$$

$$t=-\frac{1}{\sqrt{f}}\text{, }f>0$$