Is this a balance or unbalenced force? 500 N + -400 N=
A. Balanced Force
B.Unbalanced Force

The equation needed to save this amount is A = 25x + 130, where A is the total amount had and x is the amount of weeks from the start.

You can find this equation by noting that even at 0 weeks, she has 130. Then the rate of growth (which needs to be multiplied by weeks) is 25.

To solve this for $600, we simply put in 600 for A and solve for x.

A = 25x + 130

600 = 25x + 130

470 = 25x

18.8 = x

So if we are rounding up to whole weeks, it would take 19.