Determine the total number of roots of each polynomial function. f (x) = (3x4 + 1)^2

Please help thank you!! :) I don't need a detailed answer I just need the number. Have a nice evening/day.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Determine the common ratio and find the next three terms of the geometric sequence. 649-14-02-00-00_files/i0100000, 649-14-02-00-00_files/i0100001, 2, a. 3; 649-14-02-00-00_files/i0100002, 649-14-02-00-00_files/i0100003, 649-14-02-00-00_files/i0100004. c. 649-14-02-00-00_files/i0100005; 649-14-02-00-00_files/i0100006, 649-14-02-00-00_files/i0100007, 649-14-02-00-00_files/i0100008. b. 3; 6, 18, 54 d. 649-14-02-00-00_files/i0100009. 6, 18, 54 select the best answer from the choices provided a b c d

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.