Reminder Round all answers to two decimal places unless otherwise indicated.
A Support Bar A metal bar is to act as a furniture support. It is heated with a torch and then laid on a workbench for bending. The temperature B, in degrees Fahrenheit, of the bar t minutes after heat is applied is given by
a. | Make a graph of the temperature of the bar over the first 20 minutes. |
b. | The bar is hot enough to bend as long as its temperature is at least 400 degrees. During what time period is the bar at the proper temperature for bending? |
c. | What is the limiting value of B? |
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