To increase and decrease an amount by 7%, what single multiplier would you use?

Can someone tell me if this is perpendicular? !

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.

Every night nathan has to read for at least 25 minutes write and inequality that shows how long nathan can read each night