Find an equation of a parabola satisfying the given conditions.Focus at 
, directrix y = - 
A. x2 = 12y
B. y2 = 12x
C. x2 = 3y
D. y2 = 3x
Answer: C
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Use the inverse trig functions to express the angle in terms of the indicated unknown side. 
Use one of the inverse trig functions csc-1 or sec-1 to express angle A in terms of b.
A. A = csc-1 
B. A = sec-1 
C. A = sec-1 
D. A = csc-1 
Solve the problem.A gas company has the following rate schedule for natural gas usage in single-family residences:Monthly service charge$8.80Per therm service charge1st 25 therms$0.6686/thermOver 25 therms$0.85870/thermWhat is the charge for using 25 therms in one month?What is the charge for using 45 therms in one month?Construct a function that gives the monthly charge C for x therms of gas.
What will be an ideal response?
Graph.x = -8
A. 
B. 
C. 
D. 
Solve the system of linear equations using matrices.
A. (-3, -4, 4) B. (4, -4, -3) C. (4, -3, -4) D. (-3, 4, -4)