Ellen wants to purchase a book that is regularly priced at $18. the book is discounted 15%. she also needs to pay a 6% sales tax on the discounted price.

Ellen wants to purchase a book that is regularly priced at $18. The book is discounted 15%. She also needs to pay a 6% sales tax on the discounted price.

the book is originally $18...

then if you discount it by 15%...
$18-($18 x .15)=$15.3

then it says that she has to pay 6% of the already discounted price...
$15.3+(15.3 x .06)=16.218$
if you round it to the nearest whole penny its...

16.22$

The answer would be -3.9> -4.5