Provide an appropriate response.The prices (in dollars per unit) for 3 video tapes are represented by the price vector: 
A video rental store orders these tapes in the quantities given by the column vector: 
Find the total cost (in dollars) of the purchase.
What will be an ideal response?
PQ = 
= 
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Divide. Express the quotient in lowest terms.- 
÷ 
A. 
B. 
C. - 
D. 
Determine whether the expression is a polynomial. If it is a polynomial, give its degree.-6y6 - 
A. polynomial; degree 6 B. not a polynomial C. polynomial; degree -6 D. polynomial; degree 2
Solve the problem.Junior high classes of 35 students each met in the cafeteria to take achievement tests. If exactly 5 students sat at each table and 21 tables were used, how many classes took the tests?
A. 6 classes B. 16 classes C. 5 classes D. 3 classes
Solve the problem. Round as appropriate.The period of vibration P for a pendulum varies directly as the square root of the length L. If the period of vibration is 4.5 sec when the length is 81 inches, what is the period when 
inches?
A. 4.75 sec B. 5 sec C. 5.5 sec D. 0.75 sec