If the data represented by the graph is normally distributed, what are the endpoints of the middle 68% of the d --1.8 0.4 7 A. -infinity and +infinity DB. -1.8 and 11.4 c. 0.4 and 9.2 D. 2.6 and 7​

In two or more complete sentences describe how to determine the appropriate model for the set of data, (1,1), (3,2), (6,3), (11,4).

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

Bring the fraction a/a-4 to a denominator of 16-a^2