What is 11/4 as a mixed number

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

Is there an x intercept in the equation 60*1.15^x