Answer:
Area of the rectangle is 
Step-by-step explanation:
Rectangle formula is base times height.
base=11 ft height= 6ft

You will need 90 cookies. If you do 30/15, you get 2. Then you do 45x2 and get 90!
(4) is the y-intercept in the equation, and is where you plot it on the y-axis. (-3) is your slope. If you were to graph it, here is the link to how it looks like.
4th option is correct: 16 R5