A Metal Bar Is Heated and Then Placed on a Workbench

question 13

Multiple Choice

A metal bar is heated and then placed on a workbench for bending.The temperature B, in degrees Fahrenheit, t minutes after heat is applied is given by . ​
The bar can be worked so long as its temperature is higher than 440 degrees.For what values of t is the bar suitable for working? Round your answer to two decimal places.
​

• A) minutes
• B) minutes
• C) minutes
• D) minutes

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Definitions:

Compounded Monthly

Interest computation method where interest gains are calculated on a monthly basis, with each month's interest added to the principal for future calculations.

Prize

A reward given for victory or superiority in a contest or competition.

Payments

The transfer of money or goods from one person or entity to another, often in exchange for services or products.

Rate of Return

The gain or loss on an investment over a specified period, expressed as a percentage.