Question 84175
.36+.21*M<=3
.36+.21M<=3
.21M<=3-.36
.21M<=2.64
M<=2.64/.21
M<=12.57 OR 12 MINUTES CAN BE USED FOR <=$3.00
PROOF
.36+.21*12<=3
.36+2.52<=3
2.88<=3