I need to know how to do this problem i have a test tmrow.

Electric potentail difernce between two plates is 70.0 V. the plates are 0.020 meters aprt. what electric field intensity exsits betwwen them.

Here are some equations that miht help E=kQ/r^2 or: C=Q/v

K=9.0x10^9

thanks (no girls allowed)