Can someone help me please 30 points​ step by step

Sorry guys but as you have a small brain

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min. if they did not stop driving, how many miles could kyle and elijah drove in a whole day? ? 1 day = 24 hours. plzzz write a proportion i will give you 100 points