Which expression is equivalent to 3/256x19,7?

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Julie was able to walk 16 km through the zoo in 6 hours. how long will it take her to walk 24 km through the zoo?

In chemistry, n molecules of an ideal gas have pressure, volume, and tempersture that stand inthe following relation, where r is constant. solve the equation for n, the number of molecules. pv=nrt