Math experts could you please help me out don’t do me real dirty points !

The variable in a relation who’s value depends on the value of the independent variable is called what?

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

See attachment below and find the equivalent of tan(∠qsr)