Santino bought a book for $23. 54. The price of the book was $22. What was the sales-tax rate?.

Susie ran a race. she ran 55 miles an hour, and the race took her tt hours to complete.

Earth's atmosphere is unique among the planets and is able to support life because it contains a large amount of a) oxygen b) helium c) methane d) carbon dioxide

28. the new systematic nomenclature was so ( that many chemists preferred to ( the older trivial names that were at least shorter. at least, that is the ostensible reason. actually, tradition seems to carry more weight than ( with some scientists.