Choose the model that matches the described situation.A 10 gallon tank of water is drained at a rate of 3 gallons per minute for 2 minutes, is left for 4 minutes, then is emptied at a rate of 4 gallons per minute.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Simplify.7y6 × 7y3
A. 49y18 B. 49y9 C. 14y18 D. 14y9
Mathematics
Find the flux of the vector field F across the surface S in the indicated direction.F = 7xi + 7yj + 7zk , S is the surface of the sphere x2 + y2 + z2 = 4 in the first octant, direction away from the origin
A. 
?
B. 28?
C. 0
D. 56?
Mathematics
Solve the compound inequality and write the solution set using set-builder notation. Graph the solution set using a number line.2 - 2x ? 10 or 3x - 3 ? 9
A. {x
}
B. {x
}
C. {x
}
D. {x
or x ? 4}
Mathematics
Solve the problem.If an object is thrown upward with an initial velocity of 64 ft/sec, its height after t sec is given by 
Find the number of seconds before the object hits the ground.
A. 2 sec B. 32 sec C. 48 sec D. 4 sec
Mathematics