Convert 15/21 into a percent

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6