Answer
2 stores can occupy the space.
Work Step by Step
Find the width of the unleased space.
$483-(160+210)=483-370=113 ft$
Find the area of the unleased space.
$113\times 90 = 10170 ft^2$
Divide by the minimum space required to determine how many stores could occupy this space.
$10170 ft^2 \div \frac{1 store}{4000 ft^2} = 2.5425\ stores$
Round down, since rounding up would mean that the minimum space is not satisfied.
