If the moon is located at the vernal equinox on the first day of spring, what is the phase of the moon

What is the approximate circumference of the circle shown below? 12.2 cm

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When volcanoes erupt, magma (hot, molten rock) rises toward the surface of the earth. as magma cools, solid rock forms. this rock contains substances from the interior of the earth. which of the following natural resources is likely to be plentiful near subduction zones where volcanic activity has occurred in the past?