Provide an appropriate response.A normal random variable X has mean 40 and standard deviation 16. Find the area under the normal curve above the interval 16-60.
A. 0.8089
B. 0.8962
C. 0.7324
D. 0.8276
Answer: D
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Write as a percent. Round the percent to the nearest tenth if necessary.
A. 180% B. 46.3% C. 83.3% D. 8.3%
Solve the problem.A reflecting telescope contains a parabolic mirror. If the mirror is 18 inches across at its opening and is 2 feet deep, where will the light be concentrated?
A. 0.2 in. from the vertex B. 0.8 in. from the vertex C. 10.1 in. from the vertex D. 0.1 in. from the vertex
Suppose a traveler wanted to visit a museum, an art gallery, and the state capitol building. 45-minute tours are offered at each attraction hourly from 10 a.m. through 3 p.m. (6 different hours). Solve the problem, disregarding travel time.In how many ways could the traveler schedule all three tours before 1 p.m.?
A. 6 B. 1 C. 3 D. 9
Solve the equation.
= 
+ 3
A. {90} B. {-90} C. {45} D. {-45}