问题
单项选择题
Joe works two part time jobs. One week Joe worked 8 hours at one job, earning $150, and 4.5 hours at other job, earning $90. What were his average hourly earnings for the week ？（）
A.$8.00
B.$9.60
C.$16.00
D.$19.20
E.$32.00
答案
参考答案：D
