Ralph is an electrician . he cgarges an initial fee of $16 plus $33 per hour if ralph earned $197 on a job how long did the job take

x=#of hours worked
33 per hour or 33x (since 33 times every hour)
initial fee is independed of hours so
fee=33x+16

if fee=197 then solve for hours or x
197=33x+16
subtract 16 from both sides
181=33x
divide both sides by 33
5.4848484848=x
he worked 5.48 hours

The answer to the question is d