Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.sec 
A. 
B. -
C. - 
D. -2
Answer: B
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Find the foci of the hyperbola.x2 - y2 = 128
A. (16, 0), (-16, 0) B. (8, 0), (-8, 0) C. (0, 8), (0, -8) D. (0, 16), (0, -16)
Determine whether the graph is that of a function. If it is, use the graph to find its domain and range, the intercepts, if any, and any symmetry with respect to the x-axis, the y-axis, or the origin.
A. function
domain: {x|-1 ? x ? 1}
range: {y|-? ? y ? ?}
intercepts: (-?, 0), (- 
, 0), (- 
, 0), (- 
, 0), (0, 0), (
, 0), (
, 0), (
, 0), (
, 0), (?, 0)
symmetry: none
B. function
domain: all real numbers
range: {y|-1 ? y ? 1}
intercepts: (-?, 0), (- 
, 0), (- 
, 0), (- 
, 0), (0, 0), (
, 0), (
, 0), (
, 0), (
, 0), (?, 0)
symmetry: origin
C. function
domain: {x|-? ? x ? ?}
range: {y|-1 ? y ? 1}
intercepts: (-?, 0), (- 
, 0), (- 
, 0), (- 
, 0), (0, 0), (
, 0), (
, 0), (
, 0), (
, 0), (?, 0)
symmetry: origin
D. not a function
Simplify.
- 
A. 
B. 
C. 
D. 
Write and solve an equation to answer the question. Round your answer to the nearest whole number, if necessary.566 animals is 11.3% of what number of animals?
A. 1 B. 50,090 C. 5009 D. 500,900