Diana received 65 points on a project for school. She can make changes and receive three-tenths of the missing points back. She can do this 10 times . Create the formula for the sum of this geometric series, and explain your steps in solving for the maximum grade Diana can receive.
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OpenStudy (anonymous):
@phi
OpenStudy (anonymous):
@ganeshie8
OpenStudy (anonymous):
@geerky42
OpenStudy (anonymous):
hi
OpenStudy (anonymous):
hey
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OpenStudy (anonymous):
@tkhunny
OpenStudy (anonymous):
Can you help me?
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
use a calculator .... (3/10)^10
OpenStudy (anonymous):
0.0000059049
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OpenStudy (anonymous):
yes
OpenStudy (anonymous):
But I have to make the formula for the sum of the geometric series
OpenStudy (anonymous):
I came up with A_n = 100 - 35(.7)^(n-1)
OpenStudy (tkhunny):
This problem cannot be solved as stated. How many points are possible? Is it 100?
No Correction: 65
One Correct: 65 + 0.3*(35)
Two Corrections: 65 + 0.3*35 + 0.3*(100-(65 + 0.3*(35)))
Work it out. See where it goes.
OpenStudy (anonymous):
There are 100 points possible
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