help finding the voltage in a uniform E-field

1. The problem statement, all variables and given/known data
Membrane walls of living cells have surprisingly large electric fields across them due to separation of ions. What is the voltage across an 8.67-nm-thick membrane if the electric field strength across it is 9.16 MV/m? You may assume a uniform E-field.

2. Relevant equations

E=-Vd

3. The attempt at a solution

.00912V/m=-V/(8.67e-9m) =7.9e-11 V

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