The vector 
gives the number of units of two models of laptops produced by a company. The vector 
gives the prices (in dollars) of the two models of laptops, respectively. Use dot
products to determine the revenue for these two laptops if the price of each is increased by 3.5%.
A. $8,186,667
B. $8,175,000
C. $8,280,000
D. $8,227,500
E. $8,105,000
Answer: C
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