is3535
  • is3535
help
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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is3535
  • is3535
2.9x10^10 + 5.35x10^10
is3535
  • is3535
@freckles
is3535
  • is3535
@phi

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More answers

phi
  • phi
your problem is like a*x + b*x factor out the x (a+b) * x in your case the "decimals" are like a and b, and x is like 10^10
is3535
  • is3535
|dw:1442260989838:dw|
phi
  • phi
yes, I know. Do you know how to "factor out" 10^10 ?
is3535
  • is3535
no
phi
  • phi
ok do you know how to distribute the 10 in this: 10* ( 2 + 3) ?
phi
  • phi
10*(2+3) can be written as 10*2 + 10*3 factoring out 10 "undoes" that we want to do that with your problem \[ 2.9\cdot10^{10} + 5.35\cdot10^{10}= (2.9+5.35) \cdot 10^{10} \]
phi
  • phi
now use order of operations: do the operation inside the parens (i.e. add)
is3535
  • is3535
ok
is3535
  • is3535
my answer is 82.5x10^11
phi
  • phi
what do you get when you add 2.9 and 5.35
is3535
  • is3535
8.25
phi
  • phi
8.25 so 8.25 * 10^10 if you want this in scientific notation, then you want the number "out front" to be 1 or bigger , but less than 10 8.25 is bigger than 1 and smaller than 10 so it's ok \[ 8.25 \cdot 10^{10} \]
is3535
  • is3535
do you want me to time it
phi
  • phi
?
is3535
  • is3535
82.5x10^11
phi
  • phi
you mean write it as 8.5x10^10 (with an "x" ?) I used a dot (or *) because in algebra we use x for variables. but anyway you write it , it means the same thing. 8.25 times 10^10 the answer is not 82.5 x 10^11 the answer is 8.25 x 10^10 which can be written as 82.5 x 10^9 (but this is *not* scientific notation because 82.5 is too big)
is3535
  • is3535
that my answer is 8.25 x 10^10
phi
  • phi
yes
is3535
  • is3535
ok

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