Agency Is Having Problems with Personal Phone Calls Made During

question 23

Multiple Choice

agency is having problems with personal phone calls made during working hours.Each minute of a personal call costs the agency $0.50 in wasted wages.The agency hires operators to monitor calls in order to attain the optimal number of personal calls (minimize total cost of personal calls) . $$\begin{array} { c c } & \text { Total minutes af }\\\text { Numbe of } & \text { personal calls (per } \\\text { Operators } & \text { hour) } \\\hline 0 & 600 \\1 & 480 \\2 & 410 \\3 & 370 \\4 & 350 \\\hline\end{array}$$ Based on the above information,if operators receive $25 an hour,how many operators should the agency hire?

• A)0
• B)1
• C)2
• D)3
• E)4

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Definitions:

Renal Tubules

Renal tubules are microscopic tubes in the kidney where filtered blood is further processed into urine by reabsorbing water and nutrients and secreting wastes.

Cotransport

The simultaneous transport of two substances across a cell membrane in the same direction by a single carrier protein.

Active Transport

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Osmosis

The movement of water molecules through a semipermeable membrane from a region of lower solute concentration to one of higher concentration, balancing solute concentrations on both sides of the membrane.