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## Homework Statement

The current in a 1.5 mm X 1.5 mm square aluminum wire is 1.10 A. What are (a) the current density and (b) the electron drift speed?

## Homework Equations

current density: J = I/A

drift speed Vd = J/ne

## The Attempt at a Solution

It's asking for an answer in MA/m^2.. when I divide I(1.1) by A(2.25 x 10^-6) I get 488,888.889. I tried the answer 489 and 488 and it says it's incorrect. Also tried 488,889 just to make sure.. still incorrect. Any help would be appreciated?