Help a brother out y’all :))

Which of the following is true for the relation f(x)=2x^2+1

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? *

Multiply sixth of sixty six by a half of ten show step by step method