Given a cash flow stream X = (x0, x1, x2, . . . , xn), a new stream X[infinity] of infinite length is made by successively repeating the corresponding finite stream. The interest rate is r. Let P and A be the present value and the annual worth, respectively, of stream X. Finally, let P[infinity] be the present value of stream X[infinity]. Find A in terms of P[infinity] and conclude that A can be used as well as P[infinity] for evaluation purposes

Ahospital purchases a $500,000 magnetic resonance imaging (mri) machine that has a useful life of 9 years. the salvage value at the end of 9 years is $77,000. (a) write a linear equation that describes the value y (in dollars) of the mri machine in terms of the time t (in years), 0 ≤ t ≤ 9. (b) find the value, in dollars, of the machine after 6 years. $ (c) find the time, in years, when the value of the equipment will be $140,000. (round your answer to two decimal places.) yr