Sami vacuumed 104 cars in all during her 8 hour shift
Divide 104 with 8
104/8 = 13
Sami vacuumed 13 cars per hour
~
Answer:66
Step-by-step explanation:
an=21+5n
ninth term is a9
a9=21+5x9
a9=21+45
a9=66