Convert. When necessary, round the answer to two decimal places.480 minutes = hours
A. 192
B. 8
C. 20
D. 4
Answer: B
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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%
Solve the problem.A flagpole is perpendicular to the horizontal but is on a slope that rises 10° from the horizontal. The pole casts a 43-foot shadow down the slope and angle of elevation of the sun measured from the slope is 36°. How tall is the pole? Round your answer to the nearest 0.1 foot.
A. 35.4 ft B. 36.4 ft C. 33.5 ft D. 36.2 ft
Solve the problem.If f(x) = 
, find a such that f(a) = 3
A. 121 B. 11 C. 17 D. 67
Find an equation of variation for the given situation.y varies jointly as x and the square of z, and y = 500 when x = 4 and z = 5
A. y = 25xz
B. y = 5xz2
C. y = 
D. y = 6xz2