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find the length of longest pipe that can be carried level around a right angle corner of the two intersecting corridors are the width of 4 feet and 6 feet by calculus 

The value of a brand new car is $10,000 and the value depreciates 18% every year. Write a function to represent the value of the car after t years, where the quarterly rate of change can be found from a constant in the function. Round all coefficients in the function to four decimal places. Also, determine the percentage rate of change per quarter, to the nearest hundredth of a percent.

Please write the answer in equation form.

y=-x+4 y=-(3/5)x+2

hi is 1<5?