Abe, a plumber, charges $50 per hour plus $75 for making an in-home visit. the plumbing service charges $65 per hour but no set fee for a visit. how many hours of plumbing work are needed for each to cost the same?

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

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.

2.5 milligrams is equivalent to how many grams