1.Let S be the space of all 3∗k matrices, T be the space of all column vectors consists of seven components.If S is isomorphic to a subspace of T.What are possible values of k?
2.An object is tossing upward with an initial speed of 64feet/s.Suppose the gravitational acceleration is 32feet/s2. Find the smallest t,such that the object reach the height of 96 feet at time t