Solve.It is recommended that there be at least 12.2 square feet of floor space in a classroom for every student in the class. Find the minimum floor space that 18 students require. Round to the nearest tenth if necessary.
A. 219.6 sq ft
B. 147.5 sq ft
C. 12.2 sq ft
D. 67.8 sq ft
Answer: A
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For the pair of supply and demand equations
?
and 
?
where x represents the quantity demanded in units of a thousand and p the unit price in dollars, find the equilibrium quantity and the equilibrium price.
?
A. x = 4.50, p = $55.50
B. x = 9.50, p = $210.50
C. x = 9.50, p = $150.50
D. x = 7.00, p = $103.00
E. x = 2.50, p = $77.50
Rewrite the trigonometric expression as an algebraic expression involving the variable u. Assume that 
and that the value of the "inner" inverse trigonometric expression represents an angle ? such that 
cos (cot-1 u)
A. 
B. 
C. 
D. 
Multiply using one of the rules for the square of a binomial. Assume any variable exponents represent whole numbers.(10x2 - 3y)2
A. 100x4 - 60x2y + 9y2 B. 100x4 - 109x2y + 9y2 C. 20x4 - 30x2y + 6y2 D. 100x2 - 60x2y + 9y2
Find an equation of the line containing the given pair of points. Write your final answer as a linear function in slope-intercept form.(2, -2) and (0, 3)
A. f(x) = 
x + 3
B. f(x) = - 
x + 3
C. f(x) = - 
x + 3
D. f(x) = 
x + 3