HW 13-preview-1 - Version PREVIEW – HW 13 – hoffman...

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Unformatted text preview: Version PREVIEW – HW 13 – hoffman – (57225) 1 This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. CalC7c44b 001 (part 1 of 3) 10.0 points Jane wishes to bake an apple pie for dessert. The baking instructions say that she should bake the pie in an oven at a constant temper- ature of 230 ◦ C . Being a mathematician, she knows that the temperature T of the pie after t minutes of baking will be given by T ( t ) = 230- Ae − kt , where A and k are constants. After 17 min- utes of baking she notices that the tempera- ture of the pie is 138 ◦ C , while after 34 minutes it is 184 ◦ C . (i) Determine the constants A and k . 1. T ( t ) = (230- 184 · 2 − t/ 34 ) ◦ C 2. T ( t ) = (230- 184 · 2 − t/ 17 ) ◦ C correct 3. T ( t ) = (230- 92 · 2 − t/ 34 ) ◦ C 4. T ( t ) = (230- 184 · 2 t/ 17 ) ◦ C 5. T ( t ) = (230- 92 · 4 − t/ 17 ) ◦ C 002 (part 2 of 3) 10.0 points (ii) If the pie is cooked when it reaches a tem- perature of 207 ◦ C , how long does it have to be in the oven?...
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This note was uploaded on 06/14/2011 for the course MATH 305G taught by Professor Cathy during the Spring '11 term at University of Texas.

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HW 13-preview-1 - Version PREVIEW – HW 13 – hoffman...

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