Given functions f and g, determine the domain of f + g.f(x) = 3x - 7,g(x) = 
A. (0, ?)
B. (-?, -4) or (-4, ?)
C. (-?, 6) or (6, ?)
D. (-?, ?)
Answer: C
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Solve the equation for solutions in the interval [0°, 360°). Round to the nearest degree.cos 2? = 
A. {0°, 120°, 180°, 240°} B. {105°, 165°, 285°, 345°} C. {15°, 165°, 195°, 345°} D. {30°, 90°, 150°, 270°}
A college student earns $312.00 per week working three part-time jobs. Half of his 40-hour work week is spent cooking hamburgers at a fast-food chain, earning $6.00 per hour. In addition, the student earns $7.50 per hour working at a gas station and $11 per hour doing janitorial work. How many hours per week does the student work at each job? ?
A. 20 hours cooking hamburgers, 8 hours pumping gas, 12 hours janitorial B. 20 hours cooking hamburgers, 13 hours pumping gas, 25 hours janitorial C. 20 hours cooking hamburgers, 29 hours pumping gas, 13 hours is janitorial D. 8 hours cooking hamburgers, 20 hours pumping gas, 12 hours janitorial E. 21 hours cooking hamburgers, 12 hours pumping gas, 8 hours janitorial
A 140-foot antenna is on top of a tall building. From a point on the ground, the angle of elevation to the top of the antenna is 27.5°, while the angle of elevation to the bottom of the antenna from the same point is 22.5°. How tall is the building? Please round to the nearest foot. ?
A. 549 ft B. 546 ft C. 545 ft D. 543 ft E. 548 ft
Solve.
= 
A. 2.7 B. 1.06 C. 0.10 D. 8.1