The greek alphabet contains 24 letters. how many fraternity names with greek letters can be formed if each fraternity name contains 3 letters and repetition of letters is not permitted?

a)69
b)12144
c)13824

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

What is the quotient of m^6/5 ÷ 5/m^2? assume m does not equal pl

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.