Final answer:
To find 9 ÷ 2.43, we can multiply both the numerator and denominator by 100, turning the equation into 900 ÷ 243. After the calculation, 900 ÷ 243 equals 3.7037, which rounded to two decimal places is 3.70, matching answer choice b.
Step-by-step explanation:
To calculate 9 ÷ 2.43, we'll have to divide 9 by 2.43. To do this easily, we can multiply both the numerator and the denominator by 100 to get rid of the decimal in the denominator. Doing this gives us:
900 ÷ 243.
Now, we'll divide 900 by 243:
900 ÷ 243 = 3.7037...
Now, we review our answer choices for the one that matches our calculation. The decimal 3.7037 rounded to two decimal places is 3.70, which matches option b. Therefore, the answer is 3.70.