If the standard deviation of a data set was originally 6, and if each value in the data set was multiplied by 8.5, what would be the standard deviation of the resulting data? a :51
Wrong : b:9
Wrong : c: 15
Wrong d: 6
Could someone explain why the correct answer is 51

the solution is x=1

step-by-step explanation:

we are given our   equation as

let's assume

left side function is

right side function is

now, we can draw graph

and then we can get intersection point

the intersection point will be solution

so, the solution is

x=1

the distance between the school and her home is 3.6km.

12 mins = 0.2 hours = 1/5 hour

54 ÷ 3 = 18km per hour

1/5 of 18 = 3.6km per 12 mins