Helen determined she walks about 1,800 steps per 4/5 of a mile. How many steps did she take if she walked 3 miles ? (A) 3,375
(B) 4,320
(C) 5,400
(D) 6,750

Runner ran 1 4/5 miles on monday and 6 3/10 on tuesday. how many times her monday’s distance was her tuesdays distance

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.

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?