Acertain book is for sale in both belize and brazil. in belize, it sells for 80.39 belize dollars. in brazil, it sells for 63.65 brazilian reals. the exchange rate of us dollars to belize dollars is 1: 1.9246, and the exchange rate of us dollars to brazilian reals is 1: 1.7880. when converted into us dollars, which country sells the book at a more expensive price, and how much more expensive is it? round all currency values to two decimal places.

A book is sold in Belize for 80.39 Belize dollars.
In Brazil, it sells for 63.65 Brazilian reals.

The exchange rate of US Dollars to Belize Dollars is 1:1.9246
The exchange rate of US Dollars to Brazilian Real is 1:1.7880

If we convert the two into dollars,
Belize Dollars 
1 : 1.9246 = X : 80.39 
1.9246X = 80.39
X = $ 41.77 

Brazilian Real
1 : 1.7880 = X : 63.65  
1.7880X = 63.65 
X = $ 35.60

Difference = $ 41.77 - $ 35.60
Difference = $ 6.17

So, in Belize the book is more expensive by $ 6.17

Polar coordinates is 8,9

It says in the questions that it is 6.5?