Sketch a graph for the following situation: A cellular phone company offers two Plans: Plan A: $30 a month for the first 200 minutes plus 10 cents a minute for each additional minute over the first 200 minutes. Plan B: $50 a month for unlimited minutes. A. Graph the two situations on the same set of axes below. Label your axis. [4 points] ** Be sure to indicate which graph is Plan A and which is Plan B **

In exponential growth functions, the base of the exponent must be greater than 1,how would the function change if the base of the exponent were 1? how would the fiction change if the base of the exponent were between 0and 1

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

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.