xy = 4 (a) Find dy/dt, when x = 4, given that dx/dt = 13 b)find dx/dt, when x=1, givent that dy/dt=-9

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step-by-step explanation:

answer: i could not see part the question so ill explain how to get the answer

step-by-step explanation: for instance the distance she travele d is 10 and she traveled the same amout each mile so do 10 divided by how many miles she drove each time and you ge your answer.