Acar license plate is made up of 7 letters or numbers, where the numbers are whole numbers 0–9. suppose that a license plate is randomly generated, one character at a time. what is the probability that the first character is a number? enter your answer as a decimal rounded to the nearest hundredth in the box.

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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.