Find the third derivative of f at x = 0 if the maclaurin series for f(x) = 1 - 9x + 16x2 - 25x3 + …

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.