Square slabs of side 40cm are to be paved in the rectangular courtyard of an office 24m long and 16m wide. find the number of slabs required?

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

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.