Use the graph of the polynomial function f(x) to solve f(x) = 0.
A. -1.5, 2.5, 3.5
B. -1.5, 3.5
C. -3.5, -2.5, 1.5
D. -3.5, 1.5
Answer: C
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The function 
is used to estimate wave height h, in feet, from wind speed w, in miles per hour.
?
A: Make a graph of h versus w for wind speeds up to 25 miles per hour.B: A small boat can sail safely provided wave heights are no more than 4 feet. Add the horizontal line represented by 
to the graph you made in part A.C: What range of wind speeds will result in safe sailing for small boats? Round your answer to two decimal places, if necessary.
What will be an ideal response?
Refer to a normal distribution described by the following figure. The mean is ? and the standard deviation is ?.
The standard deviation ? =
A. 8 B. 4 C. 10 D. 2 E. none of these
Answer the question(s) based on the following situation: A dishonest coin (landing heads 
of the time) is tossed 1350 times. The random variable X denotes the total number of heads that come up in the 1350 tosses.What is the interquartile range for this distribution?
A. approximately 30.15 B. approximately 18 C. approximately 24.3 D. approximately 12.15 E. none of these
Solve the problem.A moving firm charges a flat fee of $45 plus $40 per hour. Let y be the cost in dollars of using the moving firm for x hours. Find the slope-intercept form of the equation.
A. y = 40x - 45 B. y = 45x - 40 C. y = 40x + 45 D. y = 45x + 40