Jim worked 40 regular hours last week plus 9 overtime hours in which he was paid 1 ½ times his hourly rate. his gross pay was $1,842.
a. what was his hourly rate?
b. what was his hourly overtime rate?

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.