Use a calculator to find the acute angle ? (to the nearest tenth of a degree) that satisfies the equation.? = cos-1 (0.3998624)
A. 293.6°
B. 23.6°
C. 66.4°
D. 113.6°
Answer: C
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Find the slope of the line. Interpret the slope in terms of rise and run.
A. Undefined; The run always equals zero B. 0; The rise always equals zero C. 2; The graph rises 2 units for each unit of run. D. -1; The graph falls 1 unit for each unit of run.
Use a calculator to solve the equation on the interval 0 ? ? < 2?. Round the answer to two decimal places.5 tan ? - 3 = 0
A. 0.54, 3.68 B. 0.54, 2.60 C. 1.03, 4.17 D. 0.54, 5.74
Simplify the expression. Assume that all variables represent nonnegative real numbers.10
- 
+ x
A. 
(5x2 - 2x + 4y)
B. 
(-5x2 + 2x + 4y)
C. 
(-2x2 + 5x + 10y)
D. 
(2x2 - 5x + 10y)
Solve the problem.The roof of a building is in the shape of the hyperbola 
where x and y are in meters. Refer to the figure and determine the height, h, of the outside walls.
a = b = 3 m
A. 9.9 m B. 8.3 m C. 3.1 m D. 69 m