21. You will need a graphing calculator for the following question. The state of California keeps track of how many millions of students are learning English as a second language each year. English Learners are shown in millions in the table. Year 2003 2004 2005 2006 2007 English Learners 1.600 1.599 1.592 1.570 1.569 A. Find an equation for the median-fit line.​

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

The angle of elevation from point a to the top of the cliff is 38 degrees. if point a is 80 feet from the base of the cliff , how high is the cliff ?