Please help me this is acids and bases calculations assignment and I am very confused

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

What is the polyatamic ion of borate