A certain model of automobile has its gas mileage (in miles per gallon, or mpg) normally distributed, with a mean of 18 mpg and a standard deviation of 2 mpg. Find the probability that a car selected at random has gas mileage less than 17 mpg. Round your answer to four decimal places.
a. 0.3085
b. 0.8085
c. 0.1915
d. 0.6915
e. 0.383
a. 0.3085
Mathematics
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Determine if the series converges or diverges; if the series converges, find its sum.
A. Converges; 
B. Converges; 9
C. Converges; 
D. Diverges
Mathematics
Solve the system by graphing.x + 6y = 65x - y = 9
A. (1.9, 0.7) B. (1.7, 1.3) C. (0.7, 1.9) D. (1.5, 1.3)
Mathematics
Find the solution set in the real numbers.7(x + 2) = (7x + 14)
A. 28 B. All real numbers C. 0 D. No solution
Mathematics
Find an equation for the circle with the given center C and radius r.Center (-2, -9), radius
A. (x - 9)2 + (y - 2)2 = 100 B. (x - 2)2 + (y - 9)2 = 10 C. (x + 9)2 + (y + 2)2 = 100 D. (x + 2)2 + (y + 9)2 = 10
Mathematics