What is the explict rule for the sequence 12,22,32,42

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Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

M. xyz =radians. covert this radian measure to its equivalent measure in degrees.