How to find the surface area of a rectangular prism

Which pair of angles are vertical angles? ∠1 and ∠4∠1 and ∠2∠2 and ∠4∠2 and ∠3more than one answer.

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g