Which statement is not true?

if two coplanar lines do not intersect, then the lines are parallel.

if two lines are parallel, then they lie in one plane and do not intersect.

two lines lie in one plane if and only if the lines are parallel.

two lines lie in one plane and do not intersect if and only if the two lines are parallel.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?