35. Which best represents the expression 15 – 3x? A
fifteen less than the product of three and a number, X
B
fifteen minus the sum of three and a number, x
C
the difference of fifteen and the sum of three and a number, x
D
the difference of fifteen and three times a number, x

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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.