A circle is drawn with the origin as center and (-3,1) is a point on that. Find the radius. Check whether the following points lie outside, inside or on the circle. a) (-3,4). b) (1,-3). c) (-1,2)
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All viruses have is a protein coat and a core of genetic material, either RNA or DNA. Unlike bacteria, viruses can't survive without a host. They can only reproduce by attaching themselves to cells.
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ok
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