Question 9 2.5 pts
There are 25 members in the school jazz band. They need to
raise $5,000 for a trip to a national competition. The school
agreed to contribute $1,000 towards the trip. Which of the
equations below shows the amount of money that each
member needs to raise to help pay for the trip?
0 25x + 5,000 - 1,000
25x + 1,000 - 5,000
1,000x + 25 - 5,000

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.