Solve the problem.The temperature at 5:00 was -7° C. Four hours later, it was -8° C. What was the change in temperature?
A. 15° C
B. 1° C
C. -15° C
D. -1° C
Answer: D
Mathematics
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Find the LCD. Do not combine fractions.
, 
A. x(x + 3)2 B. x(x + 3)(x - 5) C. (x + 3)2 D. x(x - 2)(x - 5)
Mathematics
Solve the problem.The data below represent the average monthly cost of natural gas in an Oregon home. 
Above is the graph of 45.05 sin x superimposed over a scatter diagram of the data. Find the sinusoidal function of the form 
which best fits the data.
A. y = 45.05 sin 
+ 21.20
B. y = 45.05 sin 
+ 21.20
C. y = 45.05 sin 
+ 66.25
D. y = 45.05 sin 
+ 66.25
Mathematics
Graph the ellipse and locate the foci.16x2 + 9y2 = 144
A. foci at (4, 0) and (-4, 0)
B. foci at (, 0) and (-
, 0)
C. foci at (5, 0) and (-5, 0)
D. foci at (0, 
) and (0, -
)
Mathematics
Find the limit.
A. 0
B. Does not exist
C. 
D. 1
Mathematics