PLS HELP ME I NEED AN ANSWER QUICK!
If a data set is approximately normal with a mean of 30 and a standard deviation of 2.5, about 95% of the data falls between which 2 values?

Arectangle has a length of 6cm by 8cm what is the length of a diagonal of the rectangle

Acable company claims that the average household pays $78 a month for a basic cable plan, but it could differ by as much as $20. write an absolute value inequality to determine the range of basic cable plan costs with this cable company. a. |x − 78| ≥ 20 b. |x − 20| ≥ 78 c. |x − 20| ≤ 78 d. |x − 78| ≤ 20

Heather, sarah, nicky, and jill each have nine markers. how many markers do they have in all?