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1. To save for the class fieldtrip, Duane deposited P 75 into his savings account for the first week, P 100 on the second week, P 125 on the third week, and so on until he had enough money for the trip. If it took him 12 weeks to save the target amount, how much money did he save for the fieldtrip?



2. Find the sum of the first 20 terms of the arithmetic sequence which general term is an = 23 + 7n?

3. Josh spent P150.00 on August 1, P 170.00 on August 2, P 190.00 on August 3, and so on, how much did he spend on August 31?


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