Which statement is true of every plane in three-dimensional space?

every plane must have three intercepts.

every plane must have at least two intercepts.

a plane has at least one intercept.

a plane can have no intercepts.

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?