Mathematics
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RhondaSommer (rhondasommer):
@jim_thompson5910
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RhondaSommer (rhondasommer):
how do I do this one
jimthompson5910 (jim_thompson5910):
we'll have to go through each answer choice one by one
RhondaSommer (rhondasommer):
ewww
jimthompson5910 (jim_thompson5910):
vector a = <2,4>
what is the magnitude of vector a?
RhondaSommer (rhondasommer):
so square root of 104 is the first one
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jimthompson5910 (jim_thompson5910):
yeah it's a long problem
RhondaSommer (rhondasommer):
and the square root of 89 is the second one
jimthompson5910 (jim_thompson5910):
`so square root of 104 is the first one`
that is the magnitude of the sum of the vectors
a+b = c = <2,10>
magnitude of vector c = sqrt(104)
jimthompson5910 (jim_thompson5910):
hold on
RhondaSommer (rhondasommer):
and the square root of 61 is the second one
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jimthompson5910 (jim_thompson5910):
let's stick to the first answer choice for now
RhondaSommer (rhondasommer):
oh ok
jimthompson5910 (jim_thompson5910):
ok so we're just on the first choice where
a = <2,4>
b = <0,6>
c = a+b = <2,10>
you found that ||c|| = sqrt(104) which is correct
jimthompson5910 (jim_thompson5910):
what is ||a|| equal to?
jimthompson5910 (jim_thompson5910):
`what is ||a|| equal to?` is the same as asking `what is the magnitude of vector a = <2,4>?`
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RhondaSommer (rhondasommer):
140?
RhondaSommer (rhondasommer):
brb
jimthompson5910 (jim_thompson5910):
140 is incorrect. I'll be right back as well
jimthompson5910 (jim_thompson5910):
ok I'm back
jimthompson5910 (jim_thompson5910):
were you able to find the magnitude of vector 'a' @RhondaSommer ?