Solve.A rectangular yard has a perimeter of 378. The length is 9 ft more than 4 times the width. Find the width of the yard.
A. Width: 36 ft
B. Width: 13 ft
C. Width: 37 ft
D. Width: 42 ft
Answer: A
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Answer the question.Suppose that a test for a disease correctly gives positive results for 95% of those having the disease and correctly gives negative results for 92% of those who don't have the disease. Suppose also that the incidence of the disease is 1%. If a person tests positive for the disease, what can you say about their chance of having the disease?
A. It is about 50% B. It is quite low C. It is very high D. It is 95%
Find the derivative.y = 
A. 
B. 
C. 
D. 
Solve the problem.Joe has to take a test which consists of short-answer questions worth 8 points each and essay questions worth 30 points each. He must do at least 3 short-answer questions, but won't have time to do more than 17. He has to answer at least 9 essay questions but can't spend time to do more than 17. If no more than 28 questions can be done, what is his maximum score?
A. 598 B. 576 C. 606 D. 488
Find the cross-product and determine whether the proportion is true or false.
= 
A. 91.875 = 91.875; true B. 61.25 ? 137.8125; false C. 91.25 = 61.25; true D. 91.875 ? 91.875; false