Determine which relation is a function.

a.{(–4, 3), (–2, 3), (–1, 2), (2, 5), (3, 2)}

b.{(–4, 1), (–2, 3), (–2, 1), (–1, 5), (3, 2)}

c.{(–4, 1), (–2, 3), (–1, 2), (3, 5), (3, 2)}

d.{(–4, 1), (–2, 3), (–1, 1), (–1, 5), (3, 2)}

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

What is another way to express 36 +32

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.