Which expression is best for finding the area of the polygon?

After the seventh month of a 12-month loan: the numerator is: {(n + 11) + (n + 10) + (n + 9) + (n + 8) + (n + 7) + (n + 6) + (n + 5)} = , and the denominator is: {(n) + (n + 1) + + (n + 11)} = . therefore, the fraction is numerator/denominator (to the nearest tenth) = %

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

When turned about its axis of rotation, which shape could have created this three-dimensional object?