Final answer:
Jacobi used a 20% discount card on his original breakfast bill of $22.62, resulting in a savings of $4.524. After applying the discount, he paid $18.10 for his breakfast.
Step-by-step explanation:
To calculate how much Jacobi paid for breakfast after using his 20% discount card, we first need to find out what 20% of his original bill is. Since his bill was $22.62, we multiply $22.62 by 0.20 (which is the decimal form of 20%) to find the discount amount.
0.20 × $22.62 = $4.524
We then subtract this discount amount from the original bill:
$22.62 - $4.524 = $18.096
Since we generally do not pay in fractions of a cent, we would round this to the nearest cent, giving us a final payment of $18.10 after the discount is applied.