Question

2.08*10^-8=(9*10^9)(1.6*10^-19)^2/d^2

please solve for D

Answer 1

d=sqrt((9*10^9)(1.6*10^-19)^2 /2.08E-8

d= 1.6E-19 sqrt(9E9/2.08E-8)
d= 1.6E-19 sqrt(90E8/2.08E-8)
d= 1.6E-19 sqrt(90E16/2.08 )
d= 1.6E-11 sqrt(90 /2.08 )
d=1.05246962E-10