100000000000 x 100000

I know what it is im just bored lol

Can someone me with this problem . show your work .

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.