Respuesta :

A. $9 or $10
B. $18 or $20

$57.80 ≈ $60
$60 x 0.15 = $9

$122.46 ≈ $120
$120 x 0.15 = $18

Answer:

a. $57.80

 $66.47

b. $122.46

   $140.829

Step-by-step explanation: