Ramal filled 3 pages in a stamp album. this is one sixth of the pages in the album. how many pages are three in ramal's stamp album?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

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.

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi