Let x be a continuous random variable that is normally distributed. Find the requested probability using the given mean and standard deviation.The mean is ? = 137.0 and the standard deviation is ? = 5.3.Find P(134.4 ? x ? 140.1).
A. 0.4069
B. 0.0311
C. 1.0311
D. 0.9069
Answer: A
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Make the indicated temperature conversion. Round answers to one decimal place if necessary.A weather forecaster has predicted a high temperature of 4°C for tomorrow. Convert this temperature to degrees Fahrenheit.
A. 39.2°F B. 29.8°F C. 24.8°F D. 34.2°F
Solve the problem.What is the probability of a dart landing in the shaded region?(Assume that the x's represent equal measures and that the dart is equally likely to land in any region on the board.)
A. 
B. 
C. 
D. 
Solve the problem.The cost of renting a certain type of car is $40 per day plus $0.11 per mile. Find a linear function f(x) that expresses the cost of renting a car for one day as a function of the number of miles driven x.
A. f(x) = (x + 0.11) + 40 B. f(x) = 40x + 0.11 C. f(x) = 0.11x + 40x D. f(x) = 0.11x + 40
Solve the problem.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 15 ft and the vertical clearance must be 9 ft at a point 16 ft from the center. Find an equation for the ellipse.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1