If a domain is "all real numbers" can it be a function?

Hello!

Yes

Step-by-step explanation:

Functions assign outputs to inputs. For example, the domain of f(x)=x² is all real numbers, and the domain of g(x)=1/x is all real numbers except for x=0. We can also define special functions whose domains are more limited.

Hope this helps!

Yeah

Step-by-step explanation:

you know real numbers are the combination of. the rational and irrational number so they domain over all other functions

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

idk

step-by-step explanation:

i don't know