Low ACT Math Score?

So I just got my scores back, and I bombed my math section. Should I retake the ACT or keep my scores? My top choice school is UMich. I got a 31 composite, 35 English/Reading, 29 Science, and 23 math.

How often have you taken the ACT? Many people can improve slightly. Moving to a 32 can have big effects on merit scholarships and admits. I’d retake unless you have a compelling reason not to.

This was my first time.