Is 3.62 an irrational number?

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min if they did not stop driving, how many miles could kyle and elijah drive in a whole day? ? 1 day = 24 hours. plzzz i will give you 100 points