Questions in Grade High-school

Questions in Grade High-school

[Done] Uranium-238 has a half-life of 4.5 billion years. Given that scientists estimate Earth's age to be 4.6 billion years, what is the most likely percentage of parent to daughter isotopes of this element currently existing on Earth? A. 10 percent B. 25 percent C. 50 percent D. 75 percent

[Done] Which of the following statements about coral reef preservation efforts is true? A. In order to preserve coral reefs, all aquarium trade in coral reef organisms must end. B. Legislation has had no impact on coral reef preservation efforts. C. Various preservation methods have had some positive impact on coral reef preservation. D. Education of fishermen has eliminated all coral reef loss.

[Done] How do you suppose soldiers could participate in such barbaric acts?

[Done] Atoms of which two elements in the ground state contain the same number of valence electrons? A. Al & Si B. Al & B C. Al & Zn D. Al & Ge

[Done] Are the underlined words an adjective phrase, adverb phrase, or appositive phrase? The student nurse worked throughout the day in the emergency room, a very hectic place. The underlined words are: "a very hectic place."

[Done] Which word in this sentence is a participle? "Why do you need a new pair of running shoes?" A. running B. do C. new D. need

[Done] The area of a rectangle is 12 square inches. The length is 5 more than twice the width. Find the length and width.

[Done] "To Kill A Mockingbird" What are the influences that affect the way Scout grows up? How do they affect her? What kind of person do you think she will become? Give specific examples to support your view.

[Done] Simplify the expression [tex]\frac{x^2 - x - 12}{2x^2 + 2x - 12}[/tex]. Please provide a clear explanation. Thank you.

[Done] Meg picked 7 berries. Jon picked 9 berries. Write a doubles-plus-2 fact to show how many berries they have in all.