Simplify.9 ? 9 + 8(6 + 2) + 2
A. 1226
B. 161
C. 147
D. 133
Answer: C
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A PDF for a continuous random variable X is given. Use the PDF to find the indicated probability.Find P(X ? 1.5).f(x) = 
A. 
B. 
C. 
D. 
Find the area enclosed by the given curves.y = - 4sin x, y = sin 2x, 0 ? x ? ?
A. 8
B. 4
C. 16
D. 
Decide whether or not the set of ordered pairs defines a function.{(1, 4), (2, 5), (5, -3), (7, 5), (11, 8)}
A. No B. Yes
An air freight company has three types of aircraft which carry three types of cargo. The payload, in tons, is summarized in the table below. 
Each day of the holiday season, the company must move 75 tons of mail, 50 tons of medical supplies, and 55 tons of freight. This system of equations can be represented by the matrix: 
. Reduce this matrix to calculate how many aircraft of each type should be used.
What will be an ideal response?