Question

a) callie used 9.21 grams of toothpaste in a 31-day month. approximately how much toothpaste did she use each day?

Explanation:

Step1: Set up the division formula

To find the amount of toothpaste used per day, divide the total amount of toothpaste by the number of days. The formula is \( \text{Amount per day}=\frac{\text{Total amount}}{\text{Number of days}} \), so \( \frac{9.21}{31} \).

Step2: Perform the division

\( 9.21\div31 = 0.297096774\cdots\approx0.3\) (rounded to one - decimal place).

Answer:

Callie used approximately \( 0.3 \) grams of toothpaste each day.