Solve the problem.A rectangular field is to be enclosed on four sides with a fence. Fencing costs $5 per foot for two opposite sides, and $3 per foot for the other two sides. Find the dimensions of the field of area 850 ft2 that would be the cheapest to enclose.
A. 48.6 ft @ $5 by 17.5 ft @ $3
B. 22.6 ft @ $5 by 37.6 ft @ $3
C. 37.6 ft @ $5 by 22.6 ft @ $3
D. 17.5 ft @ $5 by 48.6 ft @ $3
Answer: B
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Solve the problem.Two trains leave a train station at the same time. One travels east at 8 miles per hour. The other train travels west at 7 miles per hour. In how many hours will the two trains be 27 miles apart?
A. 0.9 hr B. 1.8 hr C. 3.6 hr D. 2.3 hr
Answer the question about percent. Round your answer to the nearest tenth of a percent, if necessary.What percent of 50 is 516?
A. 103.2% B. 1032.0% C. 0.1% D. 1.0%
Find the product.3x5(-8x - 10)
A. -24x6 - 30x5 B. -24x5 - 30 C. 24x6 + 30x5 D. -54x6
Transform the polar equation to an equation in rectangular coordinates. Then identify and graph the equation.r sin ? = 2
A. 
x = -2; vertical line 2 units
to the left of the pole
B. 
y = -2; horizontal line 2 units
below the pole
C. 
x = 2; vertical line 2 units
to the right of the pole
D. 
y = 2; horizontal line 2 units
above the pole