Convert the units using unit fractions.4.3 mi = 
ft
A. 630.67
B. 22,704
C. 1892
D. 7568
Answer: B
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Determine the values of x for which the function is differentiable.y = 
A. Differentiable for x > -6 B. Differentiable for all real numbers except 6 C. Differentiable for x ? 6 D. Differentiable for x > 6
Solve the problem.An office manager is buying used filing cabinets. Small file cabinets cost $6 each and large file cabinets cost $8 each, and the manager cannot spend more than $66 on file cabinets. A small cabinet takes up 5 square feet of floor space and a large cabinet takes up 9 square feet, and the office has no more than 62 square feet of floor space available for file cabinets. The manager must buy at least 5 file cabinets in order to get free delivery. Let x = the number of small file cabinets bought and y = the number of large file cabinets bought. Write a system of inequalities that describes these constraints.
A. 6x + 8y ? 66 5x + 9y ? 62 y ? 5 B. 6x + 8y ? 66 5x + 9y ? 62 x + y ? 5 C. 6x + 8y ? 66 5x + 9y ? 62 x + y ? 5 D. 6x + 8y ? 66 9x + 5y ? 62 x ? 5
Select the region determined by the constraints. Then find the minimum value of the objective function (if possible) and where it occurs, subject to the indicated constraints. ? Objective function: ? z = 5x + 6y ? Constraints: ? x ? 0 y ? 0 x + y ? 8 3x + 5y ? 30 ?
A. 
No minimum
B.
Minimum at (10, 0): 50
C.
Minimum at (8, 0): 49
D.
Minimum at (5, 3): 43
E.
Minimum at (0, 8): 48
Perform the indicated operations with expressions involving fractional exponents and then simplify.
?
?
A. 
B. 
C. 
D. 
E. 