Final answer:
To find the total cost, calculate the sales tax and tips. Add these to the cost of the meal.
Step-by-step explanation:
To find the total cost of the meal, you need to calculate the sales tax and the tip. First, calculate the sales tax by converting the percentage to a decimal and multiplying it by the cost of the meal. In this case, 10% of $100 is $10. Then, calculate the tip by converting the percentage to a decimal and multiplying it by the cost of the meal. In this case, 20% of $100 is $20. Finally, add the cost of the meal, the sales tax, and the tip together to find the total cost. $100 (cost of the meal) + $10 (sales tax) + $20 (tip) = $130. Therefore, the total cost is $130 (option d).