1.Solve the nth term and the 26th term of the geometric sequence with as=5/4 and a12 = 160 and the sum of the first terms of the sequence.

2.A new car is purchased for $25,000. It is estimated that the car depreciates $150 every month. What is the value of the car after 5 years.

3.After surgery gigi is told to walk twelve minutes each day the first week. Each week threafter she is to increase six minutes. How many weeks will it take until she is walking an hour a day?

4.solve the arithmetic sequence : 1,1/2,0,-1/2... find the 9th term and the sum of the first 9th term