In the exercise below, the initial substitution of x = a yields the form 0/0. Look for ways to simplify the function algebraically, or use a table and/or graph to determine the limit. When necessary, state that the limit does not exist.
A. 0
B. 4
C. 
D. 
Answer: C
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Simplify the ratio.80 cents to 88 cents
A. 
B. 
C. 
D. 
Use a graphical method to solve the system. Give x- and y-coordinates correct to the nearest hundredth.x2 + y2 = 7y = 
A. (-1.76, -1.98), (2.13, -1.57) B. (-2.13, -1.57), (1.76, -1.98) C. (-2.13, 1.57), (1.76, 1.98) D. (-2.29, -1.32), (2.29, 1.32)
The level of ozone, an invisible gas that irritates and impairs breathing, present in the atmosphere on a certain May day in the city was approximated by
?
, where 
is measured in pollutant standard index (PSI) and t is measured in hours, with 
corresponding to 7 a.m.
?
Use the second derivative test to show that the function A has a relative maximum at approximately 
. Interpret your results.
What will be an ideal response?
Solve for x.3x = 
A. x = -3
B. x = 
C. x = 
D. x = 3