Which step is the same in the construction of parallel lines and the construction of a perpendicular line through a point on the line? Create only one arc that intersects the original line.
Create two arcs that intersect the original line.
Place the compass on a point off the original line.
Place the compass on a point on the original line.

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?