Solve the problem.From a boat on the river below a dam, the angle of elevation to the top of the dam is 21°29'. If the dam is 1,601 feet above the level of the river, how far is the boat from the base of the dam (to the nearest foot)?
A. 4,058 ft
B. 4,048 ft
C. 4,068 ft
D. 4,038 ft
Answer: C
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Find the relative extrema of the function and classify each as a maximum or minimum.f(x) = 2 - x2
A. Relative minima: (-
, 0), (
, 0)
B. Relative maximum: (2, 
)
C. Relative maximum: (0, 2)
D. Relative minimum: (0, 2)
Add or subtract as indicated.11
- 15
A. 26
B. -4
C. -25
D. 3
A furniture store has a loading ramp that is 4.7 m log and its upper end is 1.1 m above its lower end. Find the angle between the ramp and the ground to the nearest tenth of a degree.
Solve.In the formula A = Iekt, A is the amount of radioactive material remaining from an initial amount I at a given time t and k is a negative constant determined by the nature of the material. An artifact is discovered at a certain site. If it has 60% of the 
it originally contained, what is the approximate age of the artifact? (carbon-14 decays at the rate of 0.0125% annually.) (Round to the nearest year.)
A. 3200 yr B. 4087 yr C. 1775 yr D. 4800 yr