How do I find where the function is decreasing?

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

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.