To rent 15 tools for 4 days, it would cost $49.
To calculate the total cost to rent 15 tools for 4 days:
- Cost per tool = $3
- Cost per day = $1
- Total cost = (Cost per tool × Number of tools) + (Cost per day × Number of days)
- Total cost = ($3 × 15 tools) + ($1 × 4 days)
- Total cost = $45 + $4 = $49
Therefore, it would cost $49 to rent 15 tools for 4 days.