Question 1173898
We can use ratios for this question.
{{{(lb_of_force)/inches}}}

We know that 12 lb of force give 3 inches of stretching so we can input that into the ratio.
{{{12/3}}}
Now we can input the other piece of information we know on the other side of the equation.
{{{(12/3)=(x/8)}}}
Now we just solve the equation.
x={{{(12*8)/3}}}
 =32

Therefore 32 lb of force is required to stretch the spring 8 inches.