Don't really understand this If someone could do it and show mer the steps on how they did it that would help a lot.

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Change negative exponents to positive. then solve. round to four decimal places