Final answer:
To find Natalie's total tip on a $12.22 bill with a 19% tip rate, convert the percentage to a decimal (0.19) and multiply by the bill amount, which results in $2.3218. After rounding to the nearest cent, the tip is $2.32, which is option C. Similarly, for Mr. and Mrs. Green's $72 meal with an 18% tip, the calculation would yield a $12.96 tip, leading to a total cost of $84.96 for the meal.
Step-by-step explanation:
The subject of this question is Mathematics, specifically focusing on percentage calculations related to tips in the context of a bill at a restaurant. This type of question is typically suited for middle school students who are learning about percentages and real-world applications of math.
To calculate the amount of tip Natalie should leave on a $12.22 bill at a rate of 19%, we first convert the percentage to a decimal by dividing by 100, which gives us 0.19. We then multiply this decimal by the bill amount:
0.19 x $12.22 = $2.3218
When we round this to the nearest cent, we get $2.32, which corresponds to option C.
Total cost of the meal for Mr. and Mrs. Green with a tip would be calculated in a similar manner. With a meal cost of $72 and an 18% tip, we calculate the tip as follows:
0.18 x $72 = $12.96
So, the total cost of the dinner including the tip would be the sum of the meal cost and the tip:
$72 + $12.96 = $84.96
Therefore, Mr. and Mrs. Green and their children would pay a total of $84.96 for their dinner.