If y=4e+06x^-2.154 yields a constant of 3777178 and elasticity of -2.154
then
y=3e+07x^-2.402 yields a constant and elasticity of what?

Estimate the magnitude of the electric field due to the proton in a hydrogen atom at a distance of 5.29×10 to the power of −11 m, the expected position of the electron in the atom.