Why is 4 : 5 equivalent 8 : 10

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.

Use the distributive law to multiply. 3(4x + 5y + 6)

What is the absolute value of the complex number -4-sqrt2i