$7.2 \times 12 \times 0.23 = ?$ Round to the nearest hundredth.
A) 19.43
B) 19.87
C) 19.44
D) 19.88
Answer (2)
Multiply 7.2 by 12 to get 86.4 .
Multiply 86.4 by 0.23 to get 19.872 .
Round 19.872 to the nearest hundredth.
The final answer is 19.87 .
Explanation
Understanding the Problem We are given the expression 7.2 × 12 × 0.23 and asked to evaluate it, rounding the result to the nearest hundredth.
Calculate the Product First, we need to calculate the product of the three numbers.
First Multiplication 7.2 × 12 = 86.4
Second Multiplication Now, we multiply the result by 0.23 : 86.4 × 0.23 = 19.872
Rounding to Nearest Hundredth Finally, we round the result to the nearest hundredth. The number 19.872 has a 2 in the thousandths place, which is less than 5 , so we round down to 19.87 .
Final Answer Therefore, 7.2 × 12 × 0.23 = 19.87 when rounded to the nearest hundredth.
Examples
In everyday life, you might use this type of calculation when determining the total cost of purchasing multiple items with a sales tax applied. For example, if you are buying 12 items that each cost $7.20, and the sales tax is 2.3% (0.023), you would calculate the total cost as 7.20 × 12 × 1.023 . This calculation helps you understand the final amount you need to pay, including tax.
The result of 7.2 × 12 × 0.23 is calculated to be 19.872 , which rounds to 19.87 when rounded to the nearest hundredth. Therefore, the answer is 19.87 .
;
