Solve the problem.A water tank can be filled in 8 minutes and emptied in 10 minutes. If the drain is accidentally left open when the tank is being filled, how long does it take to fill the tank?
A. 
min
B. 
min
C. 
min
D. 40 min
Answer: D
Mathematics
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Write a pair of parametric equations that will produce the indicated graph.The portion of the circle x2 + y2 = 36 that lies in the second quadrant
A. x = 36 cos t, y = 36 sin t, for 
< t < ?
B. x = 36 cos t, y = 36 sin t, for 
< t < 2?
C. x = 36 sin t, y = 36 cos t, for 
< t < ?
D. x = 36 sin t, y = 36 cos t, for ? < t < 
Mathematics
Factor completely. If a polynomial cannot be factored, say it is prime.6x2 - 15x - 4x + 10
A. (6x - 2)(x - 5) B. (6x + 2)(x + 5) C. (3x - 2)(2x - 5) D. (3x + 2)(2x + 5)
Mathematics
Multiply.(0.007)(0.61)
A. 0.0000427 B. 0.00427 C. 0.000427 D. 0.427
Mathematics
Use the power rule and the power of a product or quotient rule to simplify the expression.(2a)5
A. 32a B. 10a5 C. 10a D. 32a5
Mathematics