You are considering taking some courses at your local community college on a part-time basis for the upcoming school year. for a student who carries fewer than twelve credits (the full-time minimum), the tuition is $155 for each credit hour taken. all students, part-time or full-time, must pay a $20 parking fee for the semester. this fixed fee is added directly to your tuition and is included in your total bill. write an equation to determine the total bill , t, for a student carrying fewer than twelve credit hours. use n to represent the number of hours taken for the semester. then, determine its value.