Determine the amplitude or period as requested.Period of y = 2 cos 
x
A. 
B. 
C. 6?
D. 2
Answer: C
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Solve the problem. Assume all numbers are approximate unless otherwise stated or the number has been determined by a definition or counting process.At some point in the decimal equivalent of a rational number, some sequence of digits will start repeating endlessly. An irrational number never has an endlessly repeating sequence of digits. If the fraction 
is a rational number, which decimal equivalent digits indicate this?
A. 15 B. 13 C. The fraction is irrational. D. 3
Subtract and simplify.
- 
A. - 
B. - 
C. 
D. 
Use the Urban Prices Index Table to answer the question. The table shows what $100 worth of an item costs today. 
*All figures are expressed as a percent of the base of 100 from two decades ago.Urban area: ChicagoWhich item increased the least?
A. Food and beverages B. Medical C. Transportation D. Recreation
For each of (a)–(c) below, either draw a graph with the specified properties or else explain why no such graph exists.
(a) Graph with six vertices of degrees 1, 1, 2, 2, 2, and 3. (b) Graph with four vertices of degrees 1, 2, 2, and 5. (c) Simple graph with four vertices of degrees 1, 1, 1, and 5.