Atrain can hold 78 passengers. the train starts out empty and picks up one passenger at the first stop,2 passengers at the second stop,3 passengers at the third stop, and so forth. after how many stops will the train be full.

After the 12th Stop

Step-by-step explanation:

2nd stop 1+2=3

3rd 3+3=6

4th 6+4=10

5th 10+5=15

6th 15+6=21

7th 21+7=28

8th 28+8=36

9th 36+9=45

10th 45+10=55

11th 55+11=66

12th 66+12=78

After the 12th stop.

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.

it would open into a square depending on the type of envelope i’m not sure about the second part