Did i get this wrong? someone ?

Me with this one question, and i'll upvote the brainliest answer

In the diagram of circle o, what is the measure of zabc?

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m