To determine the total economic cost of building a courthouse, a government leader should multiply the cost of labor by the cost of materials. add the cost of labor and materials. subtract the cost of labor from materials. divide the cost of labor by the cost of materials.

Add the cost of labor to the materials Explanation:

If you multiply you will be getting too much, if you subtract you are saying you aren't paying your workers. if you divide it would make no sense, so your best answer is to add

indigenous people north and south were displaced, died of disease, and were killed by europeans through slavery, rxpe, and war. in 1491, about 145 million people lived in the western hemisphere. by 1691, the population of indigenous americans had declined by 90-95 percent, or by around 130 million people."