Solve the inequality. Express your answer using interval notation. Graph the solution set.|x| < 4
A. (-?, -4) ? (4, ?)
B. (-?, 4]
C. [-4, 4]
D. (-4, 4)
Answer: D
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Write the product as a sum or difference of trigonometric functions.10 cos 26° cos 13°
A. 10(sin 39° + sin 13°) B. 5(cos 39° - cos 13°) C. 5(sin 39° - sin 13°) D. 5(cos 39° + cos 13°)
Solve the problem.Coffee is best enjoyed at a temperature of 125°F. A restaurant owner wants to discover the temperature T at which he should serve his coffee so that it will have cooled to this ideal temperature in 4 minutes. He discovers that a cup of coffee served at 195°F cools to 180°F in one minute when his restaurant is at 74°F. If he maintains the restaurant temperature at 74°F, at what temperature should he serve the coffee to meet his goal?
A. 195°F B. 181°F C. 161°F D. 156°F
Use a graphing calculator to graph the function.f(x) = 
A. 
B. 
C. 
D. 
Solve.Amy can clean the house in 7 hours. When she works together with Tom, the job takes 5 hours. How long would it take Tom, working by himself, to clean the house?
A. 17
hr
B. 18hr
C. 2 hr
D. 18
hr