Which answer shows a balanced nuclear equation for the beta decay of potassium-42?

Explanation:

In Beta decay unstable nuclei will convert into stable nuclei by converting its neutron into an electron and a proton.

this process is given as

so in this process mass number will remain same but atomic number will increased by 1

So the new nuclei is of higher atomic number

So we will have

so above is the nuclear reaction

conservation of mass

mass before something happens = mass afterwards

a. spokes of a wheel.

as indicated in the question radial contains rad, also found in radius, so the fracture's would span the radius.