Determine where the function is increasing and where it is decreasing.f(x) = -x2 + 2x + 8
A. increasing on (1, ?)
decreasing on (-?, 1)
B. increasing on (-?, 1)
decreasing on (1, ?)
C. increasing on (9, ?)
decreasing on (-?, 9)
D. increasing on (-?, 9)
decreasing on (9, ?)
Answer: B
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x 
A. 
B. 
C. 
D. 
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A. 70% shaded; 30% unshaded B. 7% shaded; 3% unshaded C. 60% shaded; 40% unshaded D. 7% shaded; 93% unshaded
Solve the problem.A town has a population of 30,000 people and is increasing by 10% every year. What will the population be at the end of 5 years?
A. 48,315 people B. 45,000 people C. 18,315 people D. 43,923 people
Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the hydrogen ion concentration is 
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