1. Mary's score on the math test is equal to the lower quartile value of all the scores on the test. Based on this information, which statement about
Mary's score is most likely to be true? *
A. Mary's score is 25.
B. Mary's score is less than 25 other scores.
C. Mary's score is the same as 25% of all the scores.
D. Mary's score is greater than 25% of all the scores,

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?

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.