9) For her book club, Sharon reads for 45 minutes each day. Write an expression for the number of minutes she reads in d days.

To determine the total number of minutes Sharon reads over **\( d \)** days, you can use the following expression: \[ \text{Total minutes} = 45 \times d \] **Explanation:** - **45 minutes each day:** This is the amount of time Sharon reads every day. - **\( d \) days:** This represents the number of days she continues this reading habit. By multiplying the number of minutes she reads each day (45) by the number of days (**\( d \)**), you get the total number of minutes she reads over that period. **Final Expression:** \[ 45d \] So, the expression for the number of minutes Sharon reads in **\( d \)** days is **\( 45d \)**.