Find an equation for the indicated ellipse.Vertices (±5, -2) and foci (±2, -2)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: B
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Find the indicated probability or percentage for the normally distributed variable.At a local college, times for running the mile are approximately normally distributed with a mean of 4.5 minutes, and a standard deviation of 
What is the probability that a randomly selected time will be less than 4 minutes?
A. 0.274 B. 0.953 C. 0.227 D. 0.047
Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log 
A. log 8 + 4log x + 
log (5 - x) - log 3 + 2log (x + 5)
B. log 8 + log x4 + log (5 - x)1/4 - log 3 - log (x + 5)2
C. log 8 + 4log x + 
log (5 - x) - log 3 - 2log (x + 5)
D. log (8x4
) - log (3(x + 5)2)
Factor as completely as possible. If unfactorable, indicate that the polynomial is prime.8x2y2 + 6xy2 - 9y2
A. y2(x + 3)(8x - 3) B. y2(2x + 3)(4x - 3) C. (2x + 3y)(4x - 3y) D. (4x + 3y)(2x - 3y)
Choose the correct graph of the function.f(x) = - 
A. 
B. 
C. 
D. 