# hw11-4 - (b When does this happen 5 The price of a certain...

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Math 170-007 Homework 11/4 Fall 2010 1. The temperature, T , of an object is a function of time, x , as shown in the table below. x (minutes) 0 5 10 15 20 25 T ( C) 12 15 19 14 13 10 (a) What is the warmest the object gets? (b) When does this happen? (c) What is the coolest the object gets? (d) When does this happen? 2. The number of critters in a certain population is a function of time as graphed below. The time axis is measured in days. Critters are measured in “critters”. (a) What is the smallest population during this time span? (b) When does it occur?

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3. The height of a projectile is given by h ( t ) = 23 t - 4 . 9 t 2 meters, for 1 t 4 seconds. (a) What is the greatest height attained by the projectile? (b) When does this happen? (c) What is the lowest height? (d) When does it happen? 4. The height of a projectile is given by h ( t ) = (50 - 10 t ) 10 t - t 2 feet for 0 t 5 seconds. (a) What is the greatest height attained by the projectile?
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Unformatted text preview: (b) When does this happen? 5. The price of a certain commodity is given by P ( t ) = 50-115 t t + 10 dollars per ton, with 0 ≤ t ≤ 3 weeks. (a) What is the lowest price of the commodity? (b) What if the domain is 0 ≤ t ≤ 4 weeks? 6. The price of a certain commodity is given by P ( t ) = 50-115 t t 2 + 10 dollars per ton, with ≤ t ≤ 3 weeks. (a) What is the lowest price of the commodity? (b) What if the domain is 0 ≤ t ≤ 4 weeks? 7. From the Online Textbook, Section 6.1: Problems 2, 4, 7, 10, 12, 14, 19. Hints and Answers 1. a)19 ◦ C; b) 15 min; c)10 ◦ C; b) 25 min. 2. Approximately: a) 37 critters; b) 506 days. 3. a)27.0 m; b) 2.35 s; c) 13.6 m; d) 4 s. 4. a)125 ft; b) 5-5 / √ 2 ≈ 1 . 46 s. 5. a) \$23.46 per ton; b) \$17.14 per ton. 6. a) \$31.84 per ton; b) \$31.82 per ton....
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## This note was uploaded on 10/11/2011 for the course MATH 170 taught by Professor Staff during the Spring '08 term at Boise State.

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hw11-4 - (b When does this happen 5 The price of a certain...

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