Concept explainers
Make Sense? During the winter, you program your home thermostat so that at midnight, the temperature is 55°. This temperature is maintained until 6 A.M. Then the house begins to warm up so that by 9 A.M. the temperature is 65°. At 6 P.M. the house begins to cool. By 9 P.M., the temperature is again 55°.
In Exercises 137–140, determine whether each statement makes sense or does not make sense, and explain your reasoning. If the statement makes sense, graph the new function on the domain [0, 24]. If the statement does not make sense, correct the function in the statement and graph the corrected function on the domain [0, 24].
I decided to change the heating schedule to start one hour later than before, so I reprogrammed the thermostat to y = f(t + I)
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COLLEGE ALGEBRA-MYMATHLAB 18 WEEK >I<
- ◄ Listen A vacant lot is being converted into a community garden. The garden and a walkway around its perimeter have an area of 560 square feet. Find the width of the walkway (x) if the garden measures 15 feet wide by 19 feet long. Write answer to 2 decimal places. (Write the number without units). X 15 feet Your Answer: 19 feet Xarrow_forwardListen A stuntman jumps from a roof 440 feet from the ground. How long will it take him to reach the ground? Use the formula, distance, d = 16t2, (where t is in seconds). Write answer to 1 decimal place. (Write the number, not the units). Your Answer:arrow_forwardSolve x² - 10x + 24 = 0 ○ A) 4,6 B) -12, -2 C) 12,2 D) -4, -6arrow_forward
- Factor the polynomial completely. x^2- 9 A) (x - 1)(x -9) B) (x - 3)(x + 3) c) (x -3)(x-3) D) (x + 3)(x + 3)arrow_forwardDirections: Use the equation A = Pet to answer each question and be sure to show all your work. 1. If $5,000 is deposited in an account that receives 6.1% interest compounded continuously, how much money is in the account after 6 years? 2. After how many years will an account have $12,000 if $6,000 is deposited, and the account receives 3.8% interest compounded continuously? 3. Abigail wants to save $15,000 to buy a car in 7 years. If she deposits $10,000 into an account that receives 5.7% interest compounded continuously, will she have enough money in 7 years? 4. Daniel deposits $8,000 into a continuously compounding interest account. After 18 years, there is $13,006.40 in the account. What was the interest rate? 5. An account has $26,000 after 15 years. The account received 2.3% interest compounded continuously. How much was deposited initially?arrow_forwardTRIANGLES INDEPENDENT PRACTICE ription Criangle write and cow Using each picture or description of triangle write and solve an equation in ordering the number of degrees in each angle TRIANGLE EQUATION & WORK ANGLE MEASURES A B -(7x-2)° (4x) (3x)° (5x − 10) C (5x – 2) (18x) E 3. G 4. H (16x)° LL 2A= 2B= ZE=arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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