A 500-cc solution contains 150 g Tylenol. What is the percentage of Tylenol in this solution?

What has current research discovered with regard to communication in college classrooms?

A. Male students talk more in college classrooms than female students. B. Male students are interrupted more often than female students. C. Male students take more turns at talk, but female students take longer turns at talk. D. All of the above are research results regarding classroom participation.

"Because unemployment nationally is running at a lower level than it is here" functions as

(a) grounds. (b) warrant. (c) backing. (d) claim.