M = 57+46
(Since she has 46 less then martha, you know to find how many martha has you have to add 46!)
M=103
So martha has 103 coins!
The answer is 492.307
The number after the thousandths is 9 - greater than 5 - so we round 6 up to 7.
27$ because you do 20*15*12 then 3600*0.09 and divide that answer by 12 which is 27
