A man is walking down a very long flight of steps in a stairwell. He begins at 136 feet above ground level. He walks down with a steady rate such that he gets closer to the ground floor at a rate of 2.8 feet per second. The man is going to exit the stairwell at the 4th floor, which is the height of 42 feet above ground level. Let t be equal to the number of seconds it takes for him to get to the 4th floor. Set up and solve the equation to find the value of t. Round your answer to the nearest tenth of a second.

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Limits

When it comes to calculus, limits are considered to be a very important topic of discussion. The main importance of limit lies in expressing the value of a function as it gets closer to a certain value. Also, limits can help you to understand other topics, such as continuity and differentiability better. In a broader sense, every calculus notion is a limit. Other branches of calculus have also been derived from limits.