Answer fast.

a. one way to measure the spread of data is to calculate the range (maximum minus
minimum). what range of cell sizes did each sugar grow? why is the range often not a
useful measure of spread?

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)