Answer:
The independent variable is x and the dependent variable is y.
David purchased some cookies at the cost of
5 for $4 (5/4=1.25) and
sold them at 4 for $5(4/5=0.80).
To find cost per cookie subtract 1.25-0.80=0.45
David made a profit of $180 in total ( divide profit per cookie cost: 180/0.45= 400)
How many cookies did David purchase to make that much money?
He needed to make 400 cookie to make the profit of $180.
The formula for the volume of a cylinder is area of the base times the height.
To find the area of the base you must multiply pi times 5 squared (3.14*25=78.5)
Then you must multiply that times the height (78.5*3), which equals 235.5 cubic centimeters
You have to divide 34 by 99, 34/99=0.343434343
