The heights of a group of 1000 women are normall distributed. the mean height of the group is 170 cm with a standard deviation of 10 cm. what is the best approximation of the number of women between 170 cm and 180 cm tall?
1) 950
2) 680
3) 340
4) 170

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles