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vera_ewing
 one year ago
Check my answer please
vera_ewing
 one year ago
Check my answer please

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phi
 one year ago
Best ResponseYou've already chosen the best response.1what do you get for (1/4)^10 ? use your calculator.

phi
 one year ago
Best ResponseYou've already chosen the best response.11/1048576 which is roughly 1 divided by 1 million. that is a tiny number. if you keep multiplying by 1/4 you make that number even smaller and if you do that for a long time, you get 1/huge_huge_huge_number which we can call zero for all practical purposes. so eventually the terms are all so close to zero we can ignore them we use the formula \[ S = \frac{1 r^n}{1r} \] for the sum of n terms here n is infinity which is short for "really big" r is 1/4 we know (1/4)^huge_number is so close to 0 we will use 0 and the sum is \[S= \frac{1 0}{1\frac{1}{4}} \] to get your final answer, multiply by 960

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@phi after this question can you please help me with mine?

phi
 one year ago
Best ResponseYou've already chosen the best response.1they are being tricky. they tell you the first term \(a_1= 960\) that means if you replace i with 1 in their formula, you should get 960 do you ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1for choice C you have \[ 960\cdot \left(\frac{1}{4}\right)^i \] when i is 1 you get \[ 960\cdot \left(\frac{1}{4}\right)^1 \\ 960 \cdot \frac{1}{4} \]
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