Geometric mean of 384 and 6

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

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.

Which number line correctly shows 0.8 + 0.3?