Is pi 3.1415926535897932384626433832795028841971693993751

This is an approximation of pi.

Pi is an irrational number so it cannot ever be written exactly in digits.   

Homework 3.2

Sally has 3 dogs, one day she was walking home from work and bought a dog toy for her 3 dogs. The toy was $1.06. How many cats does Sally have?

One, it cost $1.06.  The dogs will love it!