River wants to buy 8 books that are $5.90 each. Estimate the total cost of the books before taxes.
To estimate the total cost of the books before taxes, we can multiply the price of one book by the number of books River wants to buy:
$5.90/book * 8 books = $<<5.90*8=47.20>>47.20.
Therefore, the estimated total cost of the 8 books before taxes is $47.20.