Calculate the density for each cup. Write the substance of what will sink and what will float.

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Matt is driving down 7th street. he drives 150 meters in 18 seconds. assuming he does not speed up or slow down, what is his speed?

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.