Question

Karen paid $43.70 for a book. The price of the book was $40 what wasvthe salesvtax r

Answer 1

3.70 was the tax price 

Answer 2

To find the sales tax, you would subtract that from the total price. If the book was $40 you would subtract that from $43.70. 
$43.70 - $40 = $3.70

Your answer would be $3.70

I hope this helps!