Help i need help with this im being timed‍‍

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

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 i need !

Draw a scaled copy of the circle using a scale factor of 2