SOLUTION: If Bob is buying buildings with a cost of $2.7million for the first building and each additional building price increases by 10% of the original cost, how much would 10,000 buildin

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Question 696945: If Bob is buying buildings with a cost of $2.7million for the first building and each additional building price increases by 10% of the original cost, how much would 10,000 buildings cost all together
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
10% of the original cost is +.1%2A2.7+=+.27+ million dollars
The sum of the costs of buildings 1 through 10,000 is
1st building = +2.7+
2nd building = +2.7+%2B+.27+
3rd building = +2.7+%2B+2%2A.27+
4th building = +2.7+%2B+3%2A.27+
----------------------------
Sum = +10000%2A2.7+ + ( 1 + 2 + 3 + 4 + . . . + 10000 )*.27
The second part of this is +%28%28+10000%2A10001%29+%2F+2%29%2A.27+
+%28%28+10000%2A10001%29+%2F+2%29%2A.27+
+%28+100010000%2F2%29+%2A+.27+
+50.005000%2A.27+
+13501350+
Finishing the sum:
+27000++%2B+13501350+=+13528350+
The cost altogether is
$ 13,528,350 million dollars
or 13 trillion, 528 billion, 350 million dollars
( unless I messed this up )