5n/4 = 1/5
i know the answer but don't know how it got there

Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

Can you me find the missing length. i attached an image.