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Identify if a matrix is only echelon form, reduced echelon form, or neither:

Let’s go back to Pennsylvania.a. In Pennsylvania, there are many ridges separated by valleys. The ridge tops seem to zig-zag back and forth. Sort of back-and-forth and then back-and-forth again. Explain how this came to be? Why is it this way?b. And if you go to Pennsylvania, will you find that the rocks on top of the ridges are older than those in the valleys, or it will be the other way around? Or, will there be places that are one way, and other places that are the other way? Explain.

a. What is the fuel used in nuclear power plants? (What does it consist of?)b. What are breeder reactors and why might they be important in the future? On the other hand, there are some real worries about breeder reactors. What are the potential problems?

a. How does magma composition affect the nature of volcanic eruptions?b. Explain why volcanoes powered by mafic and felsic magmas are likely to erupt in different ways. c. Describe a typical eruption involving a mafic magma and contrast it with a typical eruption involving a felsic magma.

Conventional management of Type 1 diabetes…

An example of a hormone that increases satiety is                                , whereas an example of a hormone that causes hunger is                            .

Individuals with a surgical removal of their stomach (gastrectomy)…

Which of the following statements best describes the role of potassium-sparing diuretics in the treatment of hypertension?

The first step in policy development is:

Which question is most appropriate when evaluating the “P” in the PES statement?