Find the unit vector that has the same direction as the vector v.v = 8i
A. u = 
i
B. u = 8i
C. u = 64i
D. u = i
Answer: D
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Solve the problem.A construction crane lifts a bucket of sand originally weighing 
at a constant rate. Sand is lost from the bucket at a constant rate of
. How much work is done in lifting the sand 
? (Neglect the weight of the bucket.)
A. 9600 ft ? lb B. 8700 ft ? lb C. 7800 ft ? lb D. 6900 ft ? lb
Solve the problem.Mr. Payne's salary last year was a palindromic, 7-digit amount, say 
satisfying these conditions:a + b ? e + f; a = (b + e) - 8;if c were decreased by 2, the difference would equal the sum of f and d; d = 2; and all of the numbers are multiples of 2.What was Mr. Payne's salary last year?
A. $6,642,466 B. $4,462,644 C. $4,482,844 D. $2,462,642
Simplify.(-5x)3
A. 15x3 B. 125x3 C. -125x3 D. -15x3
Use l'Hopital's Rule to evaluate the limit.
A. 3
B. - 
C. 1
D. 