A set production designer creates a right circular cylindrical pillar. The designer knows the amount of material used for the surface of the pillar and needs to find the height for a reinforcement rod.
Use A = (27) h + ar?, where r represents the radius, h represents the height of the pillar, and A represents the
surface area of the pillar. What is a formula for h in terms of the other variables that can be used to find the height?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

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.