Given:
Carlos buys a game for $7.89 and some batteries for $5.49. He pays with a $20 bill.
To find:
The best estimate of the amount of change he should get.
Solution:
First we need to approximate the data values.
[tex]\$7.89\approx \$8.00[/tex]
[tex]\$5.49\approx \$5.50[/tex]
Now, the total cost of game and batteries is
[tex]\$8.00+\$5.50=\$13.50[/tex]
He pays with a $20 bill.
[tex]Change=\$20-\$13.50[/tex]
[tex]Change=\$6.50[/tex]
Therefore, the estimated amount of change is $6.50.
