\begin{tabular}{l} Farmer McDonald gives banjo lessons for $$ \$ 20 $$ per hour. One day, he \ spends 10 hours planting $$ \$ 100 $$ worth of seeds on his farm. What total \ cost has he incurred? \ \hline OA) $$ \$ 100 $$ \ \hline OB) $$ \$ 200 $$ \ \hline OC) $$ \$ 300 $$ \ \hline OD) $$ \$ 400 $$ \ \hline\end{tabular}

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UpStudy AI · Accepted Answer

To find the total cost incurred by Farmer McDonald, we need to consider both the income he would have earned from giving banjo lessons and the cost of the seeds he purchased.

1. **Calculate the income from banjo lessons:**
   - Farmer McDonald gives banjo lessons for $$ \$ 20 $$ per hour.
   - He spends 10 hours planting seeds, so the income he misses out on is:
   $$
   \text{Income} = 20 \times 10
   $$

2. **Calculate the cost of seeds:**
   - The cost of seeds is given as $$ \$ 100 $$.

3. **Total cost incurred:**
   - The total cost incurred is the sum of the income he missed and the cost of the seeds:
   $$
   \text{Total Cost} = \text{Income} + \text{Cost of Seeds}
   $$

Now, let's perform the calculations step by step.

### Step 1: Calculate the income from banjo lessons
$$
\text{Income} = 20 \times 10 = 200
$$

### Step 2: Calculate the total cost incurred
$$
\text{Total Cost} = 200 + 100 = 300
$$

Thus, the total cost incurred by Farmer McDonald is $$ \$ 300 $$.

The correct answer is **OC) $$ \$ 300 $$**.
Farmer McDonald has incurred a total cost of \$300. The correct answer is **OC) \$300**.

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