The company Dawn uses for telephone service charges her $30 each month plus 4 cents per minute after 200 minutes of talk time. There is no charge for
the first 200 minutes of talk time.
Write a linear equation for the monthly total charge, T, in terms of the
usage time after 200 minutes, t.
Dawn phone charge 830 each mont + 4 conto = 2004
T= $30+ 0.40
b) Find the total usage time if Dawn paid $35 for her telephone bill in
February