Find the length and direction (when defined) of u × v.u = -2i - 3j + 2k, v = 4i + 6j - 4k
A. 0; 0
B. 0; 2i+ 3j - 2k
C. 
; 
(2i + 3j - 2k)
D. 
; 
(2i + 3j - 2k)
Answer: A
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Decide whether or not the number is a zero of the polynomial.P(x) = -4x3 + x2 + 7x - 2; -3
A. No B. Yes
Write the first five terms of the arithmetic sequence with the given values.a1 = -21, d = 6
A. -9, -3, 3, 9, 15 B. -21, -15, -9, -3, 3 C. 3, -3, -9, -15, -21 D. -9, -15, -21, -27, -33
Solve the problem.P(x) = -x3 + 
x2 - 60x + 100, x ? 5 is an approximation of the total profit (in thousands of dollars) from the sale of x hundred thousand tires. Find the number of hundred thousands of tires that must be sold to maximize profit.
A. 5 hundred thousand B. 5.5 hundred thousand C. 4 hundred thousand D. 4.5 hundred thousand
Multiply, then simplify the product. Assume that all variables represent positive real numbers.(4
+ 
)(4
- 
)
A. 16x + y
B. 16x - 2
- y
C. 16x2 - y2
D. 16x - y