Find the angle between u and v in radians.u = 6i, v = 10i - 5j
A. 1.56
B. 1.11
C. 1.19
D. 0.46
Answer: D
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Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 350e-0.169t, where t is the time in years? Round your answer to the nearest hundredth year.
A. 34.66 yr B. 59.15 yr C. 38.76 yr D. 4.10 yr
Solve and graph the solution set on a number line.|x - 2| - 1 ? 2
A. (-?, -1) ? (5, ?)
B. (-?, -1] ? [5, ?)
C. ?
D. [-1, 5]
Find the expected value.A car agency has found daily demand to be as shown in the table.
Find the expected number of customers.
A. 9 B. 12 C. 10 D. 2
Solve the problem.Two cars leave an intersection. One car travels north; the other east. When the car traveling north had gone 12 miles, the distance between the cars was 4 miles more than the distance traveled by the car heading east. How far had the eastbound car traveled?
A. 20 miles B. 24 miles C. 16 miles D. 12 miles