Write the following in interval notation.{x| -7 ? x < 7}
A. [-7, 7)
B. (-7, 7)
C. [-7, 7]
D. (-7, 7]
Answer: A
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A pair of honest dice is rolled, and the number on each die is noted.How many different outcomes are there in the sample space?
A. 64 B. 30 C. 6 D. 12 E. none of these
Solve the problem.The function h(t) = -16t2 + 160t - 336 gives the height h, in feet, of a flare fired from the bottom of a gorge 336 feet deep with an initial velocity of 160 ft/sec. The flare fired is visible only when it is above the rim. During what interval can the flare be seen?
A. 6 < t < 10 B. 3 < t < 7 C. 9 < t < 13 D. 0 < t < 3
Match the graph with its function using the x-intercepts.
A. f(x) = 2(x + 5)2 + 3(x + 5) - 5 B. f(x) = 2(x - 5)2 + 3(x - 5) - 5 C. f(x) = 2(x + 5)2 - 3(x + 5) - 5 D. f(x) = 2(x - 5)2 - 3(x - 5) - 5
Solve the problem.The price p and the quantity x sold of a certain product obey the demand equation p = - 
x + 180, 0 ? x ? 540.What quantity x maximizes revenue? What is the maximum revenue?
A. 405; $18,225 B. 270; $24,300 C. 540; $24,300 D. 135; $18,225