4 different math books, 6 different physics books and 2 different chemistry books are to be arranged on a shelf. how many differ
1 answer:
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Answer:
Step-by-step explanation:
Let's x be the length of the side that is NOT the same as the side along the river (or in opposite). From the fencing perimeter of 2200ft we can calculate the other side y of the rectangular:
y = 2200 - 2x
The area A of the pen would be the product of the 2 sides