Candita uses 1 of an ounce of green paint each time she draws a green line on her painting. She draws a total of 7 green
lines. Which expression represents the amount of green paint that Candita used drawing green lines on the painting? Check
all that apply.
1+1+1+1+1+1+1
0 1 2 + 1 2 + 1 2 + 2 / 2

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.

In his stamp album ,jamal has 48 new stamps and 72 used stamps. which ratio can be represented by 3/5

Mrs. robinson bought a novel at a bookstore on sale for 20% off its regular price of $29.99. mr chang bought the same novel at a different bookstore for 10% off its regular price of $25. which person received the better discount?