?The time t (in hours) required for a new employee to successfully learn to operate a machine in a manufacturing process is described by the probability density function 
over the interval
. Find the probability that a new employee will learn to operate the machine in more than 4 hours but less than 7 hours. Round
your answer to four decimal places.
?
A. ?0.5371
B. ?0.1583
C. ?0.4632
D. ?0.1469
E. ?0.3162
Answer: C
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Solve for the indicated variable.w = 
, for x
A. x = w + z - y B. x = y + wz C. x = w - zy D. x = y - wz
Solve the system of equations by the addition method. If the system does not have a single ordered pair as a solution, state whether the system is inconsistent or dependent.8x - 5y = 84x - 3y = 4
A. (1, 0) B. No solution, inconsistent C. (1, 1) D. (0, 1)
Make the indicated conversion within metric units of capacity.5800 liters to kiloliters
A. 580,000 kL B. 58 kL C. 5,800,000 kL D. 5.8 kL
Solve the problem.Let u = ln a and v = ln b. Write the following expression in terms of u and v without using the function ln.ln 
A. 7u + 8v B. 7u - 8v C. u7 - v8 D. 8u - 7v