208000 equals 58000 * 1.66 to the x power

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

Answer asap evaluate 4-0.25g+0.5h4−0.25g+0.5h when g=10g=10 and h=5h=5.