Mount StHelens and the Other Cascade Volcanoes from Mt

question 8

Multiple Choice

Mount St.Helens and the other Cascade volcanoes from Mt.Shasta in northern California to Mt.Garibaldi in southwestern B.C.are ________.

• A)young, active composite volcanoes built on a continental margin above a sinking slab of oceanic lithosphere
• B)a row of young, active, shield volcanoes built as western North America moved over a hot spot deep in the mantle
• C)old, deeply eroded composite cones built before the Pacific Ocean existed
• D)old, deeply eroded, basaltic shield volcanoes built when western North America was over the present-day site of the Hawaiian hot spot

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Definitions:

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A market structure where numerous producers compete to sell their goods or services to many buyers, leading to efficient pricing and innovation.

Market Price

The present cost at which a product or service is available for purchase or sale in the marketplace.

Net Marginal Revenue

The difference between the marginal revenue earned from selling an additional unit of a product or service and the marginal cost of producing that unit.

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