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The position of an object at time t is given by s(t) = -4 - 2t. Find the instantaneous velocity at t = 6 by finding the derivative ? Find the root of the function y=2.5sin(x/2 +1) between x=5 &-5? Help! Impossible problems!? What is neutralization? Give an example of a reaction between an acid and a base? Write a proof to show that the diagonals of a parallelogram bisect one another?