A falling object travels a distance given by the formula d=5t+4t2, where d is measured in feet and t is measured in seconds. How many seconds will it take for the object to travel 81 feet? Round the answer to 4 decimal places.

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.

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?

Proportions in triangles solve for x