The ages of members of an online gaming group are normally distributed with a mean of 23 years and a standard deviation of 4 years. there are 300 members in the group. about how many members are expected to be between 15 years old and 31 years old? 204 264 270 285

What is the average rate of change for this function for the interval from x=2 to x=4 ?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

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.