Find the foci of the ellipse.16x2 - 96x + 25y2 - 150y - 31 = 0
A. (-1, 3), (7, 3)
B. (0, 3), (6, 3)
C. (3, -1), (3, 7)
D. (-2, 3), (8, 3)
Answer: B
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SD( X )
The random variable X has the probability density function
over ? .
Compute the quantity.
Find the domain of the composite function f ? g.f(x) = 
; g(x) = 
A. {x 
}
B. {x 
C. {x 
D. {x 
Solve the problem.The students at ABC School are selling tickets for their carnival. Each ticket sells for 50¢. The school wants to raise $7500 in ticket sales. If it is now 4 weeks prior to the carnival, how many tickets need to be sold each week to reach the goal of $7500.
A. 15,000 B. 375 C. 3750 D. 37,500
Solve the problem.Inclusive of a 6.7% sales tax, a diamond ring sold for $1920.60. Find the price of the ring before the tax was added. (Round to the nearest cent, if necessary.)
A. $128.68 B. $1791.92 C. $1800 D. $2049.28