Whats the value of K?

What number produces an irrational number when multiplied by -1.25

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?