Solve.The distance D that a spring is stretched by a hanging object varies directly as the weight W of the object. If a 28-kg object stretches a spring 83 cm, find the distance when the weight is 3-kg.
A. 1.012 cm
B. 8.89 cm
C. 114 cm
D. 23.25 cm
Answer: B
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Solve the problem.If a group of 238 people is to be split into equal-sized subgroups of at least two people and no more than 30 people, what are the possible numbers of groups?
A. 2, 7, 14, and 17 B. 14, 17, 34, and 119 C. 14 and 17 D. 2, 7, 14, 17, 34, and 119
Solve the problem. Round the answer to the nearest tenth, if necessary.A long-distance runner runs 4 miles south and then 7 miles east. How far is the runner from the starting point?
A. 5.5 mi B. 8.1 mi C. 4.05 mi D. 32.5 mi
Answer the question.Which one of the following is the correct method for evaluating the expression 
A. 3 ? 62 - 5 = 182 - 5 = 324 - 5 = 319 B. 3 ? 62 - 5 = 3 ? 36 - 5 = 108 - 5 = 103 C. 3 ? 62 - 5 = (18 - 5)2 = 13 = 169 D. 3 ? 62 - 5 = 3 ? 12 = 3 ? 1 = 3
Solve the problem.Suppose a cost-benefit model is given by y = 
, where y is the cost in thousands of dollars for removing x percent of a given pollutant. Find the cost of removing 80% to the nearest dollar.
A. $7100 B. $28,400 C. $4000 D. $5680