I have a question about notation. My professor posted an older practice test with some different notation techniques than I am used to.
Find the electric field 2.5 m from the center of a region of space with a charge density given by ro=5.5 E-15 R**(2.3)"
I understand most of it but am unsure what the R**(2.3) means.
E = kQ/r^2
ρ = 5.5 E-15
The Attempt at a Solution
I assume the R**(2.3) has something to do with the volume of the sphere but other than that I have nothing.
Attached is a screenshot of the question.