Through which medium would a sound wave travel the fastest, and the slowest?

In a video store, a DVD that sells for $20 is marked down to $14. What is thepercent discount? *Explain how you got your answer. How many moles are in 9.07 x 10^23 atoms of sodium chloride? what two types of evidence are used to classify organisms. Which animal shares the most traits with humans and do both lemurs and humans have the trait listed at Point D explain? Some facts about The Climate change in Arctic , talk about the polar bears How many moles are in 56.4 grams of AlF3 What is the vertex for y=x^2-3+2 What is the value of x? Write the equation of the line that passes through the points (7,-8) and (2, -8).Put your answer in fully reduced point-slope form, unless it is a vertical or horizontalline. For each part below, use the figure to fill in the blank.If necessary, you may learn what the markings on a figure indicate.(a) Find .(b) Find . What is the value 3 1/4 2 1/3 PLZ ANSWER ASAP!!!!!! Use your knowledge of county government to identify a problem in your county. Compose a letter to your county governing board asking them to investigate the issue. a population of 100 insects that live in an area 100 square meters has a density of 1 insect per square meter. whats this an example of? When does Aegeus know that the tall stranger is truly his son, Theseus? Question 4 options:When Theseus tells Aegeus his name.When Theseus finds Aegeus alone in his chamber.When Theseus tells of his deeds.When Aegeus sees the sword that Theseus carries. A student is presented with a model of a digestive system and is asked to remove one structure (small or large organ) that will have the largest impact on decreasing chemical digestion. Which structure should the student remove differentiate between primary and secondary wants write any one importance of environment education Weak hydrogen bonds between the nitrogenous base pairs hold the two strands of DNA together. Why are the strands held together by weak hydrogen bonds instead of covalent bonds The aquarium has a scale model of a great white shark for sale in their gift shop. If the scale of the model is 2 in. : 7 ft, what is the actual length of the shark if the shark is 4in? What is the constant in the expression -18 - 3a Please help!!!!Which of the following first began in the 1980's and has since become one of the more dominant forms of personal communication?Acable Internet connectionBhard line phone servicemass market advertisingDthe mobile phone