mrs. alberts has taught seventh-grade math for thirty years. every year she calculates and records the class average on the final exam. the following dot plot represents these average scores from the past thirty years.
what percent of the scores lie within one mean absolute deviation (either way) of the mean? round to the nearest percent and express your answer as a numerical value.
note: use the rounded mean and mean absolute deviation.
%

One positive number is 9 more than twice another. if their product is 95, find the numbers

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?

Match the scale and the actual area to the area of the corresponding scale drawing. scale: 1 inch to 4 feet actual area: 128 square feet scale: 1 inch to 7 feet actual area: 147 square feet scale: 1 inch to 8 feet actual area: 256 square feet scale: 1 inch to 5 feet actual area: 225 square feet area of scale drawing scale and actual area scale drawing area: 3 square inches arrowright scale drawing area: 8 square inches arrowright scale drawing area: 4 square inches arrowright scale drawing area: 9 square inches arrowright