What is the average rate of change for the equation y=-x^2 + 4x + 6

Aparking lot is to be 400 feet wide and 370 feet deep. how many standard-sized cars fit in this lot considering a double-loaded (w4) two way traffic set up, an angle of 90° and a sw of 9’ 0’’? (do not consider handicapped parking spaces, and consider 15’ for turning aisles). show your work.

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Can someone tell me if this is perpendicular? !