Respuesta :
To get the answer, multiple 20 by 0.45= $9 than subtract 9$ from $10 which equals $1.
Answer:
1 dollar
Step-by-step explanation:
This is simple you multiply 20 by how much money
20 x .45 = 9 then we will take how much money you SPENT and minus it from what you gave the cashier
10 - 9 = 1 you got 1 dollar in change