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raytiller1
Group Title
am i right?
A store displays six computers on a shelf side–by–side. If the first computer is eight inches wide and each successive computer is four inches wider than the previous one, find the total width of the computers on the shelf.
Part 1: Describe the sigma notation used in answering the question above. (2 points)
Part 2: Show all your work and answer the question. (3 points)
 2 years ago
 2 years ago
raytiller1 Group Title
am i right? A store displays six computers on a shelf side–by–side. If the first computer is eight inches wide and each successive computer is four inches wider than the previous one, find the total width of the computers on the shelf. Part 1: Describe the sigma notation used in answering the question above. (2 points) Part 2: Show all your work and answer the question. (3 points)
 2 years ago
 2 years ago

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raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
8 ∑ 4 + 4n n=1 ∑ 4 + 4n = 4 ∑ 1 + n 4 * 8 + 4 ∑ n 32 + 4 [8 * 9 / 2] 32 + 40 72 inches
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
no, the answer is not \[\Large \sum_{n=1}^{8}4+4n\] for part 1 Part 2 depends on part 1, so that is also incorrect
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
ok can you help me then @jim_thompson5910
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
How many computers are we talking about here?
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
so you're not summing to 8 up at the top (of the sigma), you're summing to 6
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
thats the problem above says so i guess so
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
so it should be \[\Large \sum_{n = 1}^{6}4+4n\] for part 1
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
so is the first and 2nd part for part 2 right?
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
first part is, but the second is not...and you'd have to use 6 instead of 8
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
∑ 4 + 4n = 4 ∑ 1 + n 4 * 6 + 4 ∑ n 24 + 4 [6 * 7 / 2] 24 + 25 49 inches
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
4 [6 * 7 / 2] doesn't become 25
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
84? i added thats why
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
108 inches ?
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
it is 108 inches
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
108 is the total final answer for part 2
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
can you help me with another problem?
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
sure, what is it
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
help me with the steps i have an answer just don't know how? geometric partial sum ∑[i=1,5,3(4)^(i1)].
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
nevermind i found it
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
You're basically summing 3(4)^(i1) from i = 1 to i = 5 So add up 3(4)^(i1) five times like so 3(4)^(i1) 3(4)^(i1) 3(4)^(i1) 3(4)^(i1) 3(4)^(i1) Then replace the first i with 1, the second i with 2, the third with 3, etc etc like this 3(4)^(11) 3(4)^(21) 3(4)^(31) 3(4)^(41) 3(4)^(51) Now evaluate
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
but i do need help with What is the 5th partial sum of ∑[i=1,∞,1+5n]
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
the answer i got for the last problem was 11,170
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
same thing, but you're now doing it with 1+5n
 2 years ago

raytiller1 Group TitleBest ResponseYou've already chosen the best response.1
i got 60 ?
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
write out 1+5n five times 1+5n 1+5n 1+5n 1+5n 1+5n then replace the first n with 1, the second with 2, etc etc to get 1+5(1) 1+5(2) 1+5(3) 1+5(4) 1+5(5)
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
Evaluate each piece, then add them all up
 2 years ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.0
yes, you are correct the answer is 70
 2 years ago
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