Solve the problem.In 1990, the population of a country was estimated at 4 million. For any subsequent year the population, P(t) (in millions), can be modeled by the equation 
where t is the number of years since 1990. Estimate the year when the population will be 21 million.
A. approximately the year 2093
B. approximately the year 2041
C. approximately the year 2088
D. approximately the year 2016
Answer: A
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Change the fraction or mixed number into an equivalent decimal. Use bar notation to write repeating decimals. - 
A. -0.485 B. -0.525 C. -0.425 D. -0.535
Use a graphing calculator to estimate f '(a) for the given value of a.f(x) = cos x; a = 5
A. 0.2794 B. -0.2794 C. 0.9589 D. -0.9589
Perform the indicated operations and simplify.
A. 
B. 
C. 
D. 
E. 
Find the absolute maximum and absolute minimum values of the function, if they exist, over the indicated interval. When no interval is specified, use the real line (-?, ?). f(x) = x(30 - x)
A. Absolute maximum: 225; absolute minimum: 0 B. No absolute maximum; absolute minimum: 15 C. Absolute maximum: 15; no absolute minimum D. Absolute maximum: 225; no absolute minimum