Work out the perimeter of this shape. Please help!

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You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Use the second shift theorem to find the inverse laplace transform of (e^−3s) / (s^2 + 2s − 3)

Arock was dropped from the top of a building. the function that describes the height after it was dropped is f(x)=64-16x^2. what are the zeros of the function and what do they mean?