$3.75 because each apple costs 75 cents and if you multiply it by 5 you get 3.75
A^2 + B^2 = C^2.
so 49 + 576 = C^2
625 = C^2
Now find the square root of 625.
25 = C (in your case r)
6x^3+13x^2+16 is the result.
Answer:
You will get 16 Large envelopes
Shell use 13 cups of oatmeal