CPM Homework Help : PC3 Problem 3-123

Write the following expression using summation notation.

$0.25(3)^2+0.25(3.25)^2+0.25(3.5)^2+\ ...\ +0.25(5.5)^2+0.25(5.75)^2$

Hint:

How many terms are being added? Start your index at $1$ . Stop at the last term. (Alternatively, you could start at $0$ and end at $9$ .)