2.
Minimum
Cost
A rectangular area adjacent to a river is to be fenced in; no fence is needed on the river
side. The enclosed area is to be 1000
square feet. Fencing for the side parallel to the river is $5 per linear
foot, and fencing for the other two sides is $8 per linear foot; the four corner posts are $25 apiece.
Let
x
be the length of one of the sides perpendicular to the river.
(a)
Write
a function
C
(
x
) that describes the cost of the project.
(b)
What is the domain of
C

Question

2.
Minimum
Cost
A rectangular area adjacent to a river is to be fenced in; no fence is needed on the river
side. The enclosed area is to be 1000
square feet. Fencing for the side parallel to the river is $5 per linear
foot, and fencing for the other two sides is $8 per linear foot; the four corner posts are $25 apiece.
Let
x
be the length of one of the sides perpendicular to the river.
(a)
Write
a function
C
(
x
) that describes the cost of the project.
(b)
What is the domain of
C