Christopher just found beautiful yarn for 20% off at his favorite yarn store. he can make one scarf from 2/3 of a ball of yarn. if christopher buys 12 balls of yarn, how many scarves can he make?

Figure abcd is a parallelogram. if point c lies on the line x = 2, what is the y-value of point c?

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.

Give the functions f(x) = |x + 2| - 3, what is the domain? a, b,c, or d all real numbers x > 2 x < -2 all real numbers and x cannot equal to 2