An object has a mass of 40 g and a volume of 10 cm³. Its density is: 4 g/cm³
10 g/cm³
40 g/cm³
400 g/cm³

A

Explanation:

To find the density you take mass divided by volume

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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