Help please. the answer is probably simple but I'm dumb so..

On saturday morning, calls arrive at ticketmaster at a rate of 108 calls per hour. what is the probability of fewer than three calls in a randomly chosen minute?

The estimated number of people to attend the last bengals game of the season was 2000. the actual number of fans attending was 1200. by what percent did the estimate differ from the actual?

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol