Multiply and simplify. Assume that all variables represent positive real numbers.
? 
A. 
B. 2
C. 
D. 2
Answer: D
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Find the magnitude of u × v and the unit vector parallel to u × v in the direction of u × v.u = 5i + 3j + 4k, v = -10i - 6j - 8k
A. 5
; 
(-5i - 3j - 4k)
B. 5
; 
(-5i - 3j - 4k)
C. 0; no direction
D. 0; -5i- 3j - 4k
Solve the problem.Find the value of a retirement savings account paying an APR of 5.8% after 45 years (contributions made at the end of each year, including the last year) when the annual contribution is $2040. Round your answer to the nearest cent.
A. $364,998.51 B. $435,309.45 C. $399,480.24 D. $385,139.35 E. $409,517.44
Find the maximum or minimum value of the given objective function of a linear programming problem. The figure illustrates the graph of feasible points. 
z = x + 8y. Find maximum.
A. maximum: 20 B. maximum: 34 C. maximum: 27 D. maximum: 42
Divide.(x3 - 2x2 + 5x - 7) ÷ (x + 4)
A. x2 - 6x + 29 + 
B. x3 - 2x2 + 29x - 123
C. x2 - 6x + 13 + 
D. x2 - 6x + 29 + 