You worked from 2:30pm - 8:45pm with a 1/2 hour lunch break your hourly wage is $7.50/hour how much did you earn

Find out how many hours you worked first.

2:30 pm-8:45 => 6:15 hours

But they say that you take a break of 1/2 hour 

6:15- 0:30= 5:45 hours 

Convert all the data into hours. 5 hours + 45/60 hours 

Multiply data with given hourly wage. 

5x$7.50=$37.5 

(45/60)x7.50=$5.625 

In total, you earn (37.5+5.625)=> $43.125

Hope I helped :)