Find v ? u.v = 3i - 6j and u = -5
i + 8j
A. (3 - 5
)i + 2j
B. -48
i - 15j
C. -48
+ 15
D. -48 - 15
Answer: D
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Solve the problem.The amount of a particular matter left in solution during a filtering process decreases by the equation 
where n is the number of filtering steps. Find the amounts left for 
and 
(Round to the nearest whole number.)
A. 800, 3200 B. 800, 25 C. 1600, 200 D. 800, 200
Multiply.(x - 7)(x - 8)
A. x2 + 15x + 56 B. x2 + 15x - 56 C. x2 - 15x + 56 D. x2 - 15x - 56
Solve the problem.Jody is using a recipe that calls for 
cup of milk per batch. If she has 6
cups of milk available, how many batches can she make?
A. 19 batches B. 16 batches C. 20 batches D. 38 batches
?The time t (in hours) required for a new employee to successfully learn to operate a machine in a manufacturing process is described by the probability density function 
over the interval
. Find the probability that a new employee will learn to operate the machine in more than 4 hours but less than 7 hours. Round
your answer to four decimal places. ? A. ?0.5371 B. ?0.1583 C. ?0.4632 D. ?0.1469 E. ?0.3162