Question

At the bank,Brent exchanges $50 in bills for 50 one dollar coins.The total mass of the coins is 405 grams.Estimate the mass of 1 one dollar coin

Answer 1

405/50=8.1grams
if asked to simplify the answer would be 8 grams per coin

Answer 2

Data:

$50 dollars in bills → 50 coins of one dollar

Estimate the mass of one dollar coin
Solving:

50 coins → 405 grams
1 coin → x

The rule of three

50*x = 405*1
50x = 405

`x = (405)/(50)`

`x = 8,1`
We have:


`\boxed{x \approx 8grams/coin}`