Could someone help me? I have to do a report in Earth and Space Science, a 'mineral report' whats a mineral I should write about?

you could write about quartz it's a pretty interesting mineral

here are some facts

it's very well known - occurs in all forms and colors - has the most variety names of any other mineral - amethyst, citrine, and agate are commonly recognized as individual minerals but they're just varieties of quartz - quartz can be heated to intensify color - often forms inner lining of geodes - rock type can be igneous, sedimentary, or metamorphic - occurs in almost every mineral environment

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.