Maximum of function

where

you can find by using this formula:

In height function you've got:
a= -16
b= 200
c= 4
Just substitute! You'll get

Maximum height is 629 [units]
Answer:
subtract the area of the rectangle from the area of the triangle
<u>Add</u> them all up, 3.2 + 1.75 + 1.9 = <u>6.85</u>
The total weight is <u>6.85</u> pounds.