15) The D. O.T. collected data for a particular stretch of 1-85 and found that the average speed was 70 mph with a standard deviation of 15 mph and the
distribution is approximately normally distributed. The actual Speed Limit for the
stretch of road is a maximum of 70 mph and minimum of 40 mph. What
percentage of drivers actually drive between 40 mph and 70 mph?*

Which graph represents an even function?

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244