Find the directrices of the ellipse.25x2 + 36y2 = 900
A. y = ± 
B. x = ± 
C. y = ± 
D. x = ± 
Answer: D
Mathematics
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Solve.-8t + 4 = 9 - 6t
A. {- 
}
B. {- 
}
C. {- 
}
D. {
}
Mathematics
Find the curvature of the space curve.r(t) = (t + 8)i + 6j + (ln(sec t) + 3)k
A. ? = csc t B. ? = sin t C. ? = sec t D. ? = cos t
Mathematics
For the compound inequality, give the solution set in both interval and graph forms.x - 3 > 3 or x + 3 < 2
A. (-?, -1) ? (6, ?)
B. (-?, 1) ? (6, ?)
C. (-1, ?)
D. (-?, 6)
Mathematics
Solve the problem.If a garage charges $20 for an oil change, how much will it take in if oil is changed on 20 cars?
A. $40 B. $402 C. $400 D. $42
Mathematics