Jina wants to replace the wooden floor at her gym. the floor is in the shape of a rectangle. its length is 40 feet and its width is 25 feet. suppose wood flooring costs $11for each square foot. how much will the wood flooring cost for the floor?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Which is true of a liquid? it has a definite volume but not a definite mass. it has a definite mass but not a definite volume. it has a definite volume but not a definite shape. it has a definite shape but not a definite volume.