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fantasticratz2
15.07.2019 •
Mathematics
Afamily wants to fence in a rectangular area for a garden. one side of the garden will border their house and will not be fenced. find the dimensions of the garden with greatest area that can be enclosed with 80ft of fencing.
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Ответ:
area = x(80 -2x)
This is the equation of a parabola that opens downward and has its vertex (maximum) at x=20. (The zeros of area=2x(40 -x) are at x=0 and x=40. The vertex is halfway between them.)
The largest rectangular area that can be enclosed is (20 ft)×(40 ft).
Ответ:
12
Step-by-step explanation:
Remark
I can't use a symbol for the currency. I'll just get the answer in numbers. You can add the symbol.
Solution
First day: 50
Second day: - 20
Third day: - 18
50 - 20 - 18 = 12