1. An auditorium has 10 seats in the first row and 2 additional seats in each successive row. If there are 25 rows, how many seats are in the last row? How many seats are in this auditorium?
2. A piece of machinery valued at $80,000 depreciates $8,000 the first year, $7500 the second year, $7000 the third year and so on. How much did the car depreciate the eighth year?
3. Mr. Cruz is planning to give away a total of 1425 Twins tickets in the month of June. The station wants to increase the number of tickets given away each day by 3. How many should the station give away the first day?
Answers
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Answer:
(i) 58 seats
(ii) $4500
(iii) Sorry but I don't know the third one
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Step-by-step explanation:
1) a=10, d=2 &n=25.
an=?
an=a+(n-1)d
an=10+(25-1)2
an=10+24×2
an=10+48
an=58
2) original cost=$80,000
depreciated first year=8,000
second year=7,500
third year=7,000
total machinery cost after first year dep. =80,000-8,000=72,000
second year=72,000-7,500=64,500
third year=64,500-7,000=57,500
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after eight years= 29,000
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