The radioactive dating of an ingeneous rock provides

it's not c. i took the quiz and got it wrong. so my best guess is b.

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the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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you need more balloons