To find how much Winonna and Takoda would pay in total for the power tools after applying the discount, we first need to calculate the discount amount and then subtract it from the original price, \( d \).
The discount on the power tools is \( 15% \) of \( d \), which can be expressed as \( d \times 0.15 \).
Therefore, the amount they would pay after the discount would be:
\[ d - (d \times 0.15) \]
Now, evaluating this expression gives:
\[ d - (0.15d) = d(1 - 0.15) = d \times 0.85 \]
However, the expression for the total amount paid, in terms of the original cost and the discount, is:
\[ d - (d \times 0.15) \]
So the correct response to how much Winonna and Takoda would pay in total for the power tools is:
d - (d x 0.15)