Find the product. Simplify before performing the multiplication.
? 
A. 
B. 
C. 
D. 
Answer: B
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Solve by graphing.
A. (8, 4) B. No solution C. (4, 8) D. (-4, 0)
Find the derivative of the function at the given point and interpret the physical meaning of this quantity. Include units in your answer.Suppose that the speed of a train approaching a station is given by v (t) = (t - 8) 2, for 0 ? t ? 8, where t is measured in seconds and v(t) is measured in meters per second. Find v'(5).
A. v'(5) = 6 m/s per second; the instantaneous rate of change in the train's speed is 6 m/s2 at t = 5 s. B. v'(5) = -3 m/s per second; the instantaneous rate of change in the train's speed is -3 m/s2 at t = 5 s. C. v'(5) = -6 m/s per second; the instantaneous rate of change in the train's speed is -6 m/s2 at t = 5 s. D. v'(5) = -3 m/s; the instantaneous rate of change in the train's speed is -3 m/s at t = 5 s.
Calculate using the rules for order of operations.
A. - 
B. 
C. 
D. - 
Solve the problem.One maid can clean the house in 7 hr. Another maid can do the job in 8 hr. How long will it take them to do the job working together?
A. 3
hr
B. 
hr
C. 56 hr
D. 
hr