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Find the Length of RS if S is between R and T, the Length of RS is 1/4 the length of RT, RS=3x-3, and ST=2x+6? The derivative of e^x is e^x, so what if x was replaced with a different letter, like e^t? Is the derivative still the same? Please help with precalculus awarding best answer? The truck is moving at the constant acceleration 0.90m/s straight horizontal rod? Find the value of y so that the points A(3,5) B(-4,y) C(5,1) form an isosceles triangle.?