Evaluate the expression.(2592)
A. 66,822
B. 
C. 257
D. 33,411
Answer: D
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Graph using the slope and the y-intercept.x + y = 7
A. 
B. 
C. 
D. 
Solve the problem.A pharmaceutical company claims that the concentration of a drug in a patient's bloodstream will be at least 25% for 8 hours. Suppose that clinical tests show that the concentration of the drug (as a percent) t hours after injection is given by 
During what time period is the concentration at least 25%?
A. 1 hours ? t ? 5 hours B. 0 hours ? t ? 8 hours C. 1 hours ? t ? 9 hours D. 2 hours ? t ? 10 hours
Graph the ellipse.
+ 
= 1
A. 
B. 
C. 
D. 
Solve the problem.A flagpole is anchored to the ground by a rope. The pole is 28 feet long. One end of the rope is tied to the top of the pole and the other end is hooked to the ground at a distance of 15 feet from the base of the pole. What is the slope of the rope?
A. 28
B. 
C. 
D. 15