Find a parametric equation for the parabola described.Focus (-4, -4), directrix y = 12
A. y = - 
t2 - 4, x = t + 4
B. y = 
t2 - 4, x = t - 4
C. y = - 
t2 + 4, x = t - 4
D. x = 
t2 - 4, y = t - 4
Answer: C
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Solve.A machinist who had been producing 50 parts per day increased output to 85 parts per day by using a faster machine. How many times faster is the new machine? Express your answer as a mixed number.
A. 1
times faster
B. 2
times faster
C. 2
times faster
D. 1
times faster
Order the rational numbers from least to greatest.
, 
A. 
, 
B. Equivalent
C. 
, 
Express the sum or difference as a product of sines and/or cosines.sin(4?) - sin(6?)
A. 2 cos(4?) cos(5?) B. -2 sin ? cos(5?) C. 2 sin(5?) cos ? D. -2 sin ?
Provide an appropriate response.Use the max-min inequality to show that if f is integrable and f(x) ? 0 on [a, b], then 
What will be an ideal response?