Solve the given trigonometric equation by use of a graphing calculator. Use values of x for 0 ? x < 2?.sin 4x - sin 2x = 2cos x
A. 4.01, 5.42
B. 1.57, 4.01, 4.71, 5.42
C. 0.52, 1.57, 2.62, 4.71
D. 0.86, 1.57, 2.28, 4.71
Answer: B
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Solve the problem.A water tank can be filled in 9 minutes and emptied in 10 minutes. If the drain is accidentally left open when the tank is being filled, how long does it take to fill the tank?
A. 90 min
B. 
min
C. 
min
D. 
min
Simplify. Assume that each variable is nonnegative.
A. 
B. 
C. 
D. 
Find the sum.
?
?
A. 
B. 
C. 
D. 
E. 
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