Find the value of a, b,c in the equation below

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)