Your bathroom sink is broken and you need to have a plumber come to your house to make the repair. Pete's Plumbing charges $95 for a service call and $25.75 per hour for repairs. Mike's Plumbing charges $50 for a service call and $40.75 per hour for repairs. How many hours would it take for the cost to be the same for both companies?

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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.

The holiday party will cost $160 if 8 people attend. if there are 40 people who attend the party, how much will the holiday party cost