Solve the problem.A pencil box and a notebook together cost $6.28. The notebook costs $0.50 more than the pencil box. How much does the notebook cost?
A. $2.89
B. $3.89
C. $2.39
D. $3.39
Answer: D
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Find the eccentricity of the hyperbola.9x2 - 16y2 = 144
A. 
B. 
C. 
D. 
Multiply.-2002(0.7007)
A. -1402.8014 B. -141.5414 C. -1541.54 D. -1374.7454
Solve the problem.The intensity of a radio signal from the radio station varies inversely as the square of the distance from the station. Suppose the the intensity is 8000 units at a distance of 2 miles. What will the intensity be at a distance of 3 miles? Round your answer to the nearest unit.
A. 3520 units B. 3539 units C. 3556 units D. 3582 units
Solve the problem.Assume that from 1930 to 1980, the number of deaths from lead poisoning (per 100,000 people) decreased dramatically and could be modeled by 
where x is the year. Determine when, to the nearest year, this death rate was 75 or less by graphing y = f(x) and 
in 
by [0, 200, 25].
A. 1964 or after B. 1960 or after C. 1973 or after D. 1967 or after