Mathematics achievement test scores for 300 students had a mean and a variance equal to 550 and 3,600, respectively. If the dist
ribution of test scores was mound-shaped, approximately how many of the scores would fall in the interval 490 to 610? (Round your answer to the nearest whole number.)
The constant between two consecutive terms is called the common difference. The common difference is the number added to any one term of an arithmetic sequence that generates the subsequent term.
