Refer to a normal distribution described by the following figure. The mean is ? and the standard deviation is ?.
The standard deviation ? =
A. 80
B. 108
C. 54
D. 27
E. none of these
Answer: A
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Solve the problem. Round your answer to 5 decimal places when necessary.The table shows the leading causes of death for one country in a single recent year. 
Assume a population of 75.5 million.In a typical city of 500,000 , how many people would you expect to die by accident in a year?
A. Approximately 225 people B. Approximately 2250 people C. Approximately 16,987.5 people D. Approximately 1699 people
Graph the function using the slope and y-intercept.f(x) = -2x + 3
A. 
B. 
C. 
D. 
Solve the problem.If a rock falls from a height of 80 meters above the ground, the height H (in meters) after t seconds is approximately 
where 
What is the height of the rock after 4 seconds? Round your answer to the nearest tenth.
A. 1.6 meters B. -304.16 meters C. 1201.6 meters D. 60.4 meters
Solve the equation.ln 
= 8
A. {e8 - 6}
B. 
C. {e16 + 6}
D. {e16 - 6}