Final answer:
To calculate Kaylee's total cost at the Cheesecake Factory including a 20% tip, we find the tip by multiplying the bill amount $34.50 by 20%, resulting in a tip of $6.90. Adding the tip to the original bill, the total cost amounts to $41.40.
Step-by-step explanation:
To calculate the total cost of Kaylee's bill at the Cheesecake Factory including a 20% tip, we first need to determine the amount of the tip. To do this, we convert the percentage to a decimal by dividing 20 by 100, which gives us 0.20. Next, we multiply the bill amount, $34.50, by 0.20 to find the tip amount.
The calculation will look like this:
$34.50 × 0.20 = $6.90
The tip amount is $6.90. Now, we add the tip to the original bill to find the total cost. So, the total cost calculation is as follows:
$34.50 + $6.90 = $41.40
Thus, Kaylee's total cost, including a 20% tip, will be $41.40.