An object is dropped from a height of 400 feet. The amount of time, in seconds, the object takes to hit the ground can be found by solving the equation -16t^2+400=0 . How many seconds will it take to hit the ground?

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Find all solutions for 2y - 4x =2 y = 2x + 1 site: socratic.org

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of