Answer
x$\geq$$3750
Work Step by Step
Let call x be the sales amount in a week
325+0.04x$\geq$475
0.04x$\geq$150 (Subtract 325 from both sides)
x$\geq$3750 (Divide 0.04 from from both sides)
She must sell at least 3750 dollars worth of shoes to make at least 475 dollars
