PLEASE HELP! IM GIVING BRAINLIEST AND 40+ POINTS

PLEASE DON'T STEAL POINTS, IT's NOT RIGHTT

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?

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)