The following table shows the population, in millions, of a certain town in the given year.
1985198719891991
2397221320461877?
A. Calculate the average rate of change in population from 1987 to 1989. (Be careful to get the sign right.)B. Explain in practical terms the meaning of the number you calculated in part A.C. Use averaging to estimate the population in 1988.
What will be an ideal response?
A. -83.50 million people per year?B. From 1987 to 1989, on average the population decreased by 83.50 million people each year.?C. 2129.50 people
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Solve the problem.The radiator in a certain make of car needs to contain 
of 40% antifreeze. The radiator now contains 
of 20% antifreeze. How many liters of this solution must be drained and replaced with 100% antifreeze to get the desired strength?
A. 25 liters B. 12.5 liters C. 20 liters D. 16.7 liters
Use identities to simplify the expression.
+ sec w cos w
A. 1 B. csc2 w C. tan2 w D. sec2 w
Provide an appropriate response.A circular cobblestone walk that surrounds a round fountain extends 5 ft from the fountain. What is the area (to the nearest whole number) of the walk if the diameter of the fountain is 12.5 ft?
What will be an ideal response?
Provide an appropriate response.
Find the total area.
A. x2 + 32 B. x2 + 12x + 32 C. x2 + 8x + 32 D. x2 + 12