Simply 12 to the power of 16 over 12 to the power of 4

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

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.