Edgar is walking 0.5 m/s toward the back of a train that is traveling forward at 6.0 m/s west. What is Edgar's velocity relative to the ground?

5.5 m/s

Step-by-step explanation:

Seeing that the train is traveling West, then we can assume that Edgar is walking East. If we subtract the velocities of the two object then we can say that Edgar is traveling 5.5 m/s relative to the ground, since he is moving as fast as the train but relative to the ground he is slower.

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional