Ashley purchased a prepaid phone card for $25. Long distance calls cost 19 cents a minute using this card. Ashley used her card only once to make a long distance call. If the remaining credit on her card is $15.69, how many minutes did her call last?
minutes

no i do not : ( what is it?

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.

answer: answer is b.

[m < b = 120º]

step-by-step explanation: