Which of the following use of chemicals is correct? urgent questiona. window cleaner is used to clean a food contact surfaceb. chemicals are used at double the recommended strength for dificult to clean items. c. concentrated degreaser is stored in a chemical storage cabinet. d. a spray bottle used to water plants is unlabeled.

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397

Light waves can move through , but they travel fastest when they move through a(n) .