Nick is building a model for class. It's a tower that's designed to withstand high
winds. He can use a of maximum of 700
support beams and knows that each floor
will require 24 beams. Nick will track the
number of beams that remain as he adds
floors.
He can predict the number of beams that
remain by using this function:
Remaining beams (y) is a function of
floor number (x).
Use the equation tool to answer the
question.
y = 700 - 24(x)
Look

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.