An alloy is a metal made by mixing and melting two or more metals together. After the metals are mixed, the alloy must be cooled slowly to avoid crystallization. Suppose a metallurgist heats a mixture of metals to a temperature of 2,500°F and then removes the resulting alloy from the furnace. The alloy will then cool at a constant rate of 40°F every 15 minutes until it reaches room temperature. Which of the following functions represents the temperature T of the alloy h hours after it was removed from the furnace until it reaches room temperature?
A. T(h) = -15h + 2,500
B. T(h) = -40h + 2,500
C. T(h) = -160h + 2,500
D. T(h) = -600h + 2,500
Answer:C
An alloy is a metal made by mixing and melting two or more metals together. After the metals are mixed, the alloy must be cooled slowly to avoid crystallization. Suppose a metallurgist heats a mixture of metals to a temperature of 2,500°F and then removes the resulting alloy from the furnace. The alloy will then cool at a constant rate of 40°F every 15 minutes until it reaches room temperature. Which of the following functions represents the temperature T of the alloy h hours after it was removed from the furnace until it reaches room temperature?
A. T(h) = -15h + 2,500 B. T(h) = -40h + 2,500 C. T(h) = -160h + 2,500 D. T(h) = -600h + 2,500
Explanation: C