F = 95.48 N
Explanation:
Step 1:
The basic formula to calculate force is given in attachment
Step 2:
Here -72 micro coulomb and 83 micro coulomb are the charges to be calculated.
[tex]F= 9* 10^{9} * 72 *10^{-6} * 83 * 10^{-6} / .75^{2}[/tex]
F = 95.48 N
