Use a computer or graphing calculator to find the limit. Begin by plotting the function in an appropriate window.
(
- 
)
A. 
B. 
C. ?
D. 0
Answer: D
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Solve.A plane flying with a tailwind flew at a speed of 420 mph, relative to the ground. When flying against the tailwind, it flew at a speed of 310 mph. Graph the system to find the speed of the plane in calm air and the speed of the tailwind.
A. Speed of plane: 375 mph Speed of tailwind: 45 mph B. Speed of plane: 45 mph Speed of tailwind: 375 mph C. Speed of plane: 55 mph Speed of tailwind: 365 mph D. Speed of plane: 365 mph Speed of tailwind: 55 mph
Solve the problem.On the December 8 billing date, Hakeem had a balance due of $640.34 on his credit card. The transactions during the following month were: 
The interest rate on the card is 1.4% per month. Using the average daily balance method, find the balance due on January 8 (December has 31 days).
A. $786.82 B. $650.59 C. $787.17 D. $786.66
Solve the rational inequality. Express your solution on a number line using interval notation.
? 0
A. [-12, 1] ? [2, ?)
B. [-12, 1) ? [2, ?)
C. (-?, -12] ? (1, 2]
D. (-?, -12] ? [2, ?)
Simplify the expression. Assume that all variables are positive when they appear.
A. 1
B. 
C. 
D. 