For a math-focused event, if each activity costs $15 and 10 activities are planned, what is the total cost for activities?

To find the total cost for the activities at the event, you multiply the cost of each activity by the number of activities planned. In this case, the cost per activity is $15, and there are 10 activities.

The calculation can be expressed as:

Total cost = Cost per activity × Number of activities

Total cost = $15 × 10

Total cost = $150

This shows that the total cost for 10 activities, each costing $15, is indeed $150, confirming the correctness of this answer.