The population N, in thousands, of a certain city t years after 2000 is given by 
.
The formula is valid over a 10-year period. Over what period was the population decreasing? A graph of N versus t can help you answer this question.
A. From 2003 to 2010
B. From 2004 to 2010
C. From 2000 to 2003
D. From 2000 to 2004
Answer: A
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Perform the indicated operation.
÷ 
A. 
B. 1
C. 
D. 
Solve.While traveling in a car at a constant speed, the centrifugal acceleration passengers feel while the car is turning is inversely proportional to the radius of the turn. If the passengers feel an acceleration of 12 feet per second per second when the radius of the turn is 80 feet, find the acceleration the passengers feel when the radius of the turn is 240 feet.
A. 5 feet per second per second B. 7 feet per second per second C. 4 feet per second per second D. 6 feet per second per second
Solve.If the voltage, V, in an electric circuit is held constant, then the current, I, is inversely proportional to the resistance, R. If the current is 300 milliamperes when the resistance is 2 ohms, find the current when the resistance is 12 ohms.
A. 1794 milliamperes B. 1800 milliamperes C. 100 milliamperes D. 50 milliamperes
Solve the problem.Find f(2) when f(x) = x2 + 5x + 7.
A. -13 B. 21 C. 1 D. 7