Enrollment in a school has grown exponentially since the school opened. below is a graph depicting this growth. determine the average rate of change from x = 0 to x = 20.

an exponential graph has time in years on the x axis and enrollments on the y axis. an upward rising curve begins at zero comma thirty and passes through twenty comma eighty.

0.4

2.5

5

30

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.

What are two numbers that have a sum of 15?

You’re ordering more thread for blue jeans co. you usually purchase from ted’s threads, which sells 12 thread spools for $27. you recently received a notice from wade's wares that says you can buy thread from them for $2.30 each for the first 2 dozen and $2 a spool thereafter. you need to order 5 dozen spools. what percentage can you save by going with wade’s wares?