Solve the problem.A weather forecaster predicts that the temperature will drop 3 degrees each hour for the next 8 hours. If the temperature is 4 degrees before the temperature starts falling, what is the temperature after the drop?
A. 24°
B. -7°
C. -20°
D. -24°
Answer: C
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Solve the problem.Select the correct statement for the definition of the limit: 
f(x) = L means that __________________
A. if given any number ? > 0, there exists a number ? > 0, such that for all x,
0 < 
< ? implies 
< ?.
B. if given a number ? > 0, there exists a number ? > 0, such that for all x,
0 < 
< ? implies 
> ?.
C. if given any number ? > 0, there exists a number ? > 0, such that for all x,
0 < 
< ? implies 
> ?.
D. if given any number ? > 0, there exists a number ? > 0, such that for all x,
0 < 
< ? implies 
< ?.
Evaluate the limit if one exists.
A. 
B. 
C. 
D. Does not exist
Find the exact value by using a half-angle identity.cos 
A. 
B. 
C. - 
D. - 
Solve for the unknown in the equation.182 = 13S + 13
A. S = 1 B. S = 13 C. S = 156 D. S = 160