Please help me. I need to Convert 4.57 hectograms to milligrams.

This is different from the first one can someone me

Raymond just got done jumping at super bounce trampoline center. the total cost of his session was $43.25 . he had to pay a $7 entrance fee and $1.25 for every minute he was on the trampoline. write an equation to determine the number of minutes (t) that raymond was on the trampoline.

50 points~ ! i have to turn this in tomarrow