To free slaves (colored people)
Answer:
I'm not sure if this is a written question or not, but I'll give it my best shot.
Horses changed the way Native Americans hunted due to the fact they could now catch up to their prey. Before, they would have to be stealthy with their hunting, as one shot could mess up, and the prey would run away. However, now they could mess up, and still be able to catch up to prey.
Answer:
Creating algebra, the use of decimals and trigonometry.
Explanation:
The three mathematical innovations credited to the Islamic empire are the creation of algebra, the use of decimals and trigonometry. These innovations occur due to the hard work of Muslim scientist that created many equations which can also be used today in mathematics and other related fields so these mathematical innovations credited to the Islamic empire and Muslim scientists.