Is 5/8 an irrational number.?

Question and answers are in the attached picture. you so much in advance.

The graph of h(x)= |x-10| +6 is shown. on which interval is this graph increasing

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3