2. Use the choose-an-element method to prove each of the following: (a) ˚ x 2 R j x 2 3x 10 < 0 D fx 2 R j 2 < x < 5g (b) ˚ x 2 R j x 2 5x C 6 < 0 D fx 2 R j 2 < x < 3g (c) ˚ x 2 R j x 2 4 D fx 2 R j x 2g [ fx 2 R

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction. express your answer as a chemical equation. identify all of the phases in your answer.

Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.

Write the overall equation for the reaction for lithium battery