Julie is a math tutor. she charges each student $210 for the first 7 hours of tutoring and $20 for each additional hour. when the number of hours (h) that julie spends tutoring a student is greater than 7 (h > 7), the equation that gives the amount (a) that julie earns in dollars is a = 210 + 20(h + 7) a = 210 + 20(h - 7) a = -210 + 20(h - 7) a = 210 + (h - 7)/20. if julie earns $410 tutoring one student, solve for the total number of hours she spent tutoring the student.
a.) 38
b.) 19
c.) 17
d.) 12