Solve the problem.A rectangular field is to be enclosed on four sides with a fence. Fencing costs $8 per foot for two opposite sides, and $5 per foot for the other two sides. Find the dimensions of the field of area 640 ft2 that would be the cheapest to enclose.

A. 20 ft @ $8 by 32 ft @ $5
B. 15.8 ft @ $8 by 40.5 ft @ $5
C. 40.5 ft @ $8 by 15.8 ft @ $5
D. 32 ft @ $8 by 20 ft @ $5


Answer: A

Mathematics

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A. $8000 B. $11,000 C. $7000 D. $5500

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Find the expression.u = Find 

A. 3
B.
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Write the number in standard form.9 ten thousands + 6 hundreds

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