How do i find rational roots of 18x^4 + 15x^3 - 34x^2 + 15x - 2 =0 ?

Acompany is testing in comparing to lightbulb designs the box plot shows the number of hours that each lightbulb design last before burning out which statement is best supported by the information of the plot

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd