Calculating Force on a 1uC Charge

[Ember Cult]

Homework Statement

Find Force at 1uC charge
https://i.gyazo.com/12891ce5b3adc422acc64daa6e8d3f25.png

Homework Equations

The Attempt at a Solution

Assume 1uC charge is at point P 2*10^-8C is at A and 10^-8C is at B
FP = FPA + FPB

FPA = K*2*0.01*1/100
= 0.0002*K
= 2k* 10 ^-4

FPA = K*0.01*1/25
= 0.00004*K
= 4K x 10^-4

Now adding them using vector addition,
sqrt((4K*10^-4)^2 + (2K*10^-4)^2 + 0) --(cos(90) will be 0)
sqrt((20K*10^-16)

 

[haruspex]

Your handling of the powers of ten looks off (or you are using nonstandard units for force).
What's 10^-6x10^-8?
Later, what's (4k10^-4)²?