Problems 15-16. compute the mean and standard deviation of the random variable with the given
discrete probability distribution.
15.
х
u-x
(u-x)
(u - x)? *p(x)
[1
2
15
7
p(x)
0.42
0.18
0.34
0.06
t
mean =
standard deviation =

Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry

If the discriminant if a quadratic equation is 4 which statement describes the roots?

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance