Find the foci of the ellipse.16x2 + 64x + 25y2 - 50y - 311 = 0
A. (1, -6), (1, 2)
B. (-5, 1), (1, 1)
C. (-7, 1), (3, 1)
D. (-6, 1), (2, 1)
Answer: B
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Solve the problem.A bicycle tire has a radius of 11.4 in. How far will it travel in 155 revolutions?
A. 63,300 in. B. 127,000 in. C. 5550 in. D. 11,100 in.
Find the extreme values of the function subject to the given constraint.
A. Maximum: 26 at 
minimum: 0 at 
B. Maximum: 36 at 
minimum: 0 at 
C. Maximum: 36 at 
minimum: -36 at 
D. Maximum: 26 at 
minimum: -26 at 
Solve the problem.A hill on a hiking trail goes up 60 feet over a distance of 130 feet. Find the grade of the hill.
A. 
B. 60
C. 
D. 130
Solve the problem.Walt made an extra $5000 last year from a part-time job. He invested part of the money at 10% and the rest at 9%. He made a total of $460 in interest. How much was invested at 9%?
A. $4000 B. $2500 C. $3000 D. $1000