Please explain this to me!

What is the length of bc ? enter your answer in the box. bc =

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

The box plot shows the number of raisins found in sample boxes from brand c and from brand d. each box weighs the same. what could you infer by comparing the range of the data for each brand? a) a box of raisins from either brand has about 28 raisins. b) the number of raisins in boxes from brand c varies more than boxes from brand d. c) the number of raisins in boxes from brand d varies more than boxes from brand c. d) the number of raisins in boxes from either brand varies about the same.