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Virus A is about 2 x 10-18 meters in
length. Virus B is twice as long.
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What is their total combined length? Write
your answer in scientific notation.

The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. how many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?

Simplify 4 square root of 2 end root plus 7 square root of 2 end root minus 3 square root of 2 . (1 point) 2 square root of 8 8 square root of 2 8 square root of 6 6 square root of 8

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?