What is the constant of proportionality for the table? What does it represent? Reminder: k= y/x

Drag each scenario to show whether the final result will be greater than the original value, less than the original value, or the same as the original value. 1. a 25% decrease followed by a 50% increase 2. a 20% decrease followed by a 25% increase

Ill mark the brainliest if you me with the these three questions 7,8,9

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?