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Selena2345
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A Goblin Miner earns 1 cent the first day, 2 cents the second day 4 cents the third day, 8 cents the fourth day and so on doubling the amount each day. How much will the miner earn in 7 days ? 2 Weeks? 1 Month ( Make An Estimate Before Solving) Show/ Explain All Work
 one year ago
 one year ago
Selena2345 Group Title
A Goblin Miner earns 1 cent the first day, 2 cents the second day 4 cents the third day, 8 cents the fourth day and so on doubling the amount each day. How much will the miner earn in 7 days ? 2 Weeks? 1 Month ( Make An Estimate Before Solving) Show/ Explain All Work
 one year ago
 one year ago

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ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
So...
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
Um, I'm not so sure how to put this in an equation...
 one year ago

Selena2345 Group TitleBest ResponseYou've already chosen the best response.0
it is not an equation
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
But, you can estimate obviously that it's about 70
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
You need an esquation to solve this...i think
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
Imma work this out first. (:
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
We see that the series whose sum gives the total number of cents follows a regular pattern: each new term added to it is a power of two. This is an example of a geometric series.
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
In our case, we are told that the number of cents given each day is double the number given the day before, which suggests that the ratio of this series is 2.
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
no. pennies given on second day 2  = 2 no. pennies given on first day 1 no. pennies given on third day 4  = 2 no. pennies given on second day 2 no. pennies given on fourth day 8  = 2 no. pennies given on third day 4
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
obviously, the ratio of the geometric series that gives the total number of cents on a particular day is 2.
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
we can use the fact that the sum of a geometric series (called S) with n terms whose ratio is r is this S = (first term)(1r^n)/(1r)
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
I think... ><'' not very expertise on this but had hw on this like 2 wks ago.
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
This means that for our series with a first term of 1 and a ratio of 2, we find the sum after n days = 1(1  2^n) / (1  2) =  (1  2^n) = 2^n  1
 one year ago

Selena2345 Group TitleBest ResponseYou've already chosen the best response.0
are we done with the question christine
 one year ago

xcrypt Group TitleBest ResponseYou've already chosen the best response.0
The equation would be: 2^x1, where x represents the day. substitute 7 for x and you have your answer
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
1 2^11 = 21 = 1 2 2^21 = 41 = 3 3 2^31 = 81 = 7 4 2^41 = 161 = 15
 one year ago

xcrypt Group TitleBest ResponseYou've already chosen the best response.0
I am sorry, 2^(x1)
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
there you go x3
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
So...basically do the same for each day doubling it
 one year ago

Selena2345 Group TitleBest ResponseYou've already chosen the best response.0
is the question whole finish
 one year ago

ChristineToTheRescue Group TitleBest ResponseYou've already chosen the best response.0
5 2^51 = 181 = 17 and so forth
 one year ago

Selena2345 Group TitleBest ResponseYou've already chosen the best response.0
is the answer finish now christine
 one year ago

Selena2345 Group TitleBest ResponseYou've already chosen the best response.0
thank you christine
 one year ago
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