Look at the image below

Answer:
(A) 33.9 (B) 22.6
Step-by-step explanation:
We first need to round to the nearest dollar for both prices. Lets examine both numbers.
$30.12 $19.93
We can round $30.12 to $30 since the number in the tenths place is 1 and we can round $19.93 to $20 since there is a nine in the tenths place.
Now we must find the tax for each number. We can do that by multiplying each number by 0.13 since that is 13% in decimal form. Lets do that now
[tex]30*0.13=3.9[/tex] [tex]20*0.13=2.6[/tex]
Now we can find the final price for each number by adding the tax to the rounded price.
[tex]30+3.9=33.9[/tex] [tex]20+2.6=22.6[/tex]
Hence, (A) 33.9, (B) 22.6