When scientists looked at the polarity of bands of rock on either side of the mid-ocean ridges, what did they?

that the patterns of polarity matched up on both sides is the answer 

When scientists looked at the polarity of bands of rock on either side of the mid-ocean ridge, what did they find?

>>That the patterns of polarity matched up on both sides.

Good work.

5×^2+20-15 or -(5x^2-20+15)