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 2 years ago
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
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)

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raytiller1
 2 years ago
Best ResponseYou've already chosen the best response.18 ∑ 4 + 4n n=1 ∑ 4 + 4n = 4 ∑ 1 + n 4 * 8 + 4 ∑ n 32 + 4 [8 * 9 / 2] 32 + 40 72 inches

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.0no, 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

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

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

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

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

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

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

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

raytiller1
 2 years ago
Best 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

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.04 [6 * 7 / 2] doesn't become 25

raytiller1
 2 years ago
Best ResponseYou've already chosen the best response.184? i added thats why

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

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.0108 is the total final answer for part 2

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

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

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

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

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.0You'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

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

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

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

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.0write 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)

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

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