determine which ones are a function (which letters) and if everything is right I will mark brainliest 10 points available

Find the total area for the regular pyramid ( follow the answer set up in the picture)

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.

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference