The initial mass of a certain species of fish is 7 million tons. The mass of​ fish, if left​ alone, would increase at a rate proportional to the​ mass, with a proportionality constant of 2​/yr. ​However, commercial fishing removes fish mass at a constant rate of 15 million tons per year. In how many years will all the fish be​ gone?

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m