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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Graph the polar equation.r = 
A. 
B. 
C. 
D. 
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Solve the problem.Helen Weller invested $11,000 in an account that pays 11% simple interest. How much additional money must be invested in an account that pays 14% simple interest so that the total interest is equal to the interest on the two investments at the rate of 12%?
A. $8000 B. $11,000 C. $7000 D. $5500
Mathematics
Find the expression.u = 
Find 
A. 3
B. 
C. 3
D. 45
Mathematics
Write the number in standard form.9 ten thousands + 6 hundreds
A. 9600 B. 90,600 C. 60,900 D. 90,060
Mathematics