Which of the following describes the main reason the spanish conquistadors needed native american slaves? (5 points) they needed to find gold and send it back to spain. the native american slaves aided them with their tobacco crops. the spanish wanted to convert the native americans to catholicism. they needed the native americans to make the spanish armada strong.

Its not D but the Spanish conquistadors  wanted to bring gold back for Spain but i doubt they needed slaves for it except for locating it. they did although have some Native Americans with them when attacking the Aztecs but they weren't there by force.

They don't need Native Americans for the Armada. I don't think they only wanted them for converting them to Catholicism but they did like converting people.
 
I would say A If it is two options i would say A and C although if they wanted slaves for tobacco crops they could just get them from Africa with the slave trade.

Use the formula: (n-2)×180, where n is the number of sides(18-2)×180= 28800, now this is the full exterior angle of 18-gon so you divide it by 18.28800÷18=160