Which expression represents the fourth term in the binomial expansion of (e + 2f)10

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

The table shows the results of a survey on students favorite kind of movie. select the appropriate values to complete the model to find the fraction of students that prefer comedy or action movie.

Place the indicated product in the proper location on the grid. -4x3y2(7xy4)