Solve the problem.In recent years, many states have passed laws against smoking in public buildings. The total number of states N that have passed a no smoking in public buildings law, t years after 1990 is given by the function, N(t) = 
. How many states had passed the law in 1990?
A. 0
B. 0.313
C. 1.563
D. 3.125
Answer: D
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Use the graph of a quadratic function to find the solution set of the equation or inequality. For a solution set that involves an interval, use interval notation.-x2 + 8x - 16 > 0
A. (-?, ?) B. x = 4 C. ? D. (-?, 4) ? (4, ?)
Solve the equation.
+ 
= -1
A. 
B. ?
C. {5}
D. {0}
Provide an appropriate response.If a < b, is it always true that 
> 
? Explain.
What will be an ideal response?
Solve the problem.The manager of a coffee shop has one type of coffee that sells for $9 per pound and another type that sells for $14 per pound. The manager wishes to mix 50 pounds of the $14 coffee to get a mixture that will sell for $11 per pound. How many pounds of the $9 coffee should be used?
A. 62.5 lb B. 125 lb C. 75 lb D. 37.5 lb