Idon’t know how to add intergers. how do i. it is too hard for me

How many grams are in 8 kilograms? if 100 grams = 1 kilogram

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.

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5