Solve the problem.The profit made when t units are sold, t > 0, is given by 
Determine the number of units to be sold for which P < 0 (a loss is taken).
A. 10 < t < 12
B. t > 0
C. t < 10 or t > 12
D. t = 10 or t = 12
Answer: A
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Solve the problem.To find the height of this tree, Juanita marked the tree at eye level, 1.8 meters above the ground. She measured 39 m from the base of the tree and then held a 5-cm ruler vertically in front of her eye until the ruler just obscured the tree above the mark. Using a string tied through a hole in one end of the ruler, Juanita found that the distance from her eye to the ruler was 5.7 centimeters. What was the height of the tree? Round to the nearest unit.
A. 34 m B. 36 m C. 40 m D. 30 m
Determine if the following is a linear equation in one variable. If not, state why.13x - 18 = 4x - 72
A. It is not a linear equation in one variable because it is not an equation. B. It is a linear equation in one variable. C. It is not a linear equation in one variable because it has more than one variable. D. It is not a linear equation in one variable because 13x has an exponent other than 1.
Find the exact value of the expression if ? = 45°. Do not use a calculator.f(?) = tan ?Find f(?).
A. 
B. 0
C. -1
D. 1
Write the product as a sum or difference of trigonometric functions.2 sin 8x sin 17x
A. cos 9x - cos 25x
B. cos 25x + cos 9x
C. 
(cos 25x + cos 9x)
D. sin 25x + sin 9x