Marcos works 8 hours a day. he makes $19 an hour. on tuesday, he only worked of a day. how much did marcos earn on tuesday?
which answer gives the correct solution and explains how to check if the answer is reasonable?
a.
solution: $57.
explanation: since marcos only worked of the day,
he made about 3 × $20 or about $60.
b.
solution: $456.
explanation: since marcos only worked of the day,
he earned about 3 × $20 or about $60.
since there are 8 hours in the work day,
then marcos made about 8 × $60 or about $480.
c.
solution: $114.
explanation: if marcos worked all day,
then he would have made about 8 × $20 or about $160.
since marcos only worked of the day, or 0.75,
he would make about $120 (160 × 0.75).