Pearson eText for Precalculus: Concepts Through Functions, A Right Triangle Approach to Trigonometry -- Instant Access (Pearson+)

4th Edition

ISBN: 9780137399581

Author: Michael Sullivan, Michael Sullivan

Publisher: PEARSON+

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Chapter 1.5, Problem 83AYU

85. Thermostat Control Energy conservation experts estimate that homeowners can save $5%$ to $10%$ on winter heating bills by programming their thermostats 5 to 10 degrees lower while sleeping. In the graph (next page), the temperature T(in degrees Fahrenheit) of a home is given as a function of time $t$ (in hours after midnight) over a 24-hour period.

(a) At what temperature is the thermostat set during daytime hours? At what temperature is the thermostat set overnight?

(b) The homeowner reprograms the thermostat to $y = T (t) - 2$ . Explain how this affects the temperature in the house. Graph this new function.

(c) The homeowner reprograms the thermostat to $y = T (t + 1)$ . Explain how this affects the temperature in the house. Graph this new function.

Source: Roger Albright, 547 Ways to Be Fuel Smart, 2000

Chapter 1.5, Problem 83AYU, 85. Thermostat Control Energy conservation experts estimate that homeowners can save 5% to 10% on

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Chapter 1.5, Problem 82AYU

Chapter 1.5, Problem 84AYU

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Chapter 1 Solutions

Pearson eText for Precalculus: Concepts Through Functions, A Right Triangle Approach to Trigonometry -- Instant Access (Pearson+)

Ch. 1.1 - The inequality 1x3 can be written in interval...Ch. 1.1 - 2. If , the value of the expression is _______ ...Ch. 1.1 - 3. The domain of the variable in the expression is...Ch. 1.1 - 4. Solve the inequality: . Graph the solution set....Ch. 1.1 - To rationalize the denominator of 3 5 2 , multiply...Ch. 1.1 - 6. A quotient is considered rationalized if its...Ch. 1.1 - If f is a function defined by the equation y=f(x),...Ch. 1.1 - If f(x)=x+1 and g(x)=x3, then ____________x3(x+1).Ch. 1.1 - True or False Every relation is a function.Ch. 1.1 - True or False The domain (f.g)(x) consists of the...

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Solution Summary: Thermostat Control Energy conservation experts estimate that homeowners can save 5 to 10 % on winter heating bills by programming their thermostats 5-10 degrees lower while sleeping.

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