Sally made a 50 average for the first nine weeks. She currently has a 70 average for the second nine weeks. Sally knows that she needs a bo to pass the fall semester. So she takes her calculator and enters 50 + 70 : 2. She tells Mr. Waddle that she has an 85 average. Mr. Waddle tells her, "Sally, you will pass the semester but your actual average is much'less than the 85 you got on your calculator." What did Sally do wrong?

Data are collected to see how many ice-cream cones are sold at a ballpark in a week. day 1 is sunday and day 7 is the following saturday. use the data from the table to create a scatter plot.

Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)

Plz hurry evaluate the expression a+b where a=8 and b=19