Jesse buys his coworkers lunch from the local steakhouse. The food costs $105.79, and the sales tax rate is 9%. Jesse wants to leave a 20% tip based on the pre-tax amount. How much will the total be, including tax and tip? (1 point)

The sales tax on the food will be 105.79 * 0.09 = $<<105.79*0.09=9.52>>9.52.

The tip will be on the pre-tax amount, so Jesse wants to leave a 105.79 * 0.20 = $<<105.79*0.20=21.158>>21.16 tip.
In total, the bill will be 105.79 + 9.52 + 21.16 = $<<105.79+9.52+21.16=136.47>>136.47. Answer: \boxed{136.47}.

To calculate the total cost including tax and tip, we need to calculate the tax amount and the tip amount separately.

Step 1: Calculate the sales tax.
The sales tax rate is 9%, so we can calculate the tax amount by multiplying the cost of the food by 9/100.
Tax = $105.79 * (9/100)
Tax = $9.52

Step 2: Calculate the pre-tax amount.
To calculate the pre-tax amount, we subtract the tax amount from the total cost of the food.
Pre-tax amount = $105.79 - $9.52
Pre-tax amount = $96.27

Step 3: Calculate the tip amount.
Jesse wants to leave a 20% tip based on the pre-tax amount, so we can calculate the tip amount by multiplying the pre-tax amount by 20/100.
Tip = $96.27 * (20/100)
Tip = $19.25

Step 4: Calculate the total amount.
The total amount is the sum of the pre-tax amount, the tax amount, and the tip amount.
Total amount = Pre-tax amount + Tax + Tip
Total amount = $96.27 + $9.52 + $19.25
Total amount = $125.04

Therefore, the total cost including tax and tip will be $125.04.

To calculate the total cost, including tax and tip, we need to follow these steps:

Step 1: Find the tax amount
To find the tax amount, we multiply the cost of the food by the tax rate. In this case, the cost of the food is $105.79 and the tax rate is 9%.

Tax amount = cost of food x tax rate
Tax amount = $105.79 x 9% = $9.52 (rounded to the nearest cent)

Step 2: Find the pre-tax amount
The pre-tax amount is the cost of the food minus the tax amount.

Pre-tax amount = cost of food - tax amount
Pre-tax amount = $105.79 - $9.52 = $96.27

Step 3: Find the tip amount
To find the tip amount, we multiply the pre-tax amount by the tip rate. In this case, the tip rate is 20%.

Tip amount = pre-tax amount x tip rate
Tip amount = $96.27 x 20% = $19.25 (rounded to the nearest cent)

Step 4: Calculate the total cost
The total cost is the sum of the cost of the food, tax amount, and tip amount.

Total cost = cost of food + tax amount + tip amount
Total cost = $105.79 + $9.52 + $19.25 = $134.56 (rounded to the nearest cent)

Therefore, the total cost, including tax and tip, is $134.56.