Calculate.
× 64.73
A. 222.
B. 230.15
C. 222.95
D. 230.
Answer: C
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Solve.Mark and Rachel both work for Smith Landscaping Company. Mark can finish a planting job in 3 hours, while it takes Rachel 4 hours to finish the same job. If Mark and Rachel will work together on the job, and the cost of labor is $40 per hour, what should the labor estimate be? (Round to the nearest cent, if necessary.)
A. $68.57 B. $23.33 C. $140.00 D. $137.14
Solve the problem.A company knows that the unit cost C and the unit revenue R from the production and sale of x units are related by 
Find the rate of change of unit revenue when the unit cost is changing by 
and the unit revenue is $4000.
A. $373.20/unit B. $557.90/unit C. $260.00/unit D. $188.50/unit
Find the vertex and axis of symmetry of the graph of the function.f(x) = -5x2 - 2x - 2
A. 
; x = 
B. 
; x = -5
C. 
; x = - 
D. (5, -2); x = 5
Find the difference and check.12.1 - 1.728
A. 14.828 B. 10.472 C. 13.828 D. 10.372