anonymous
  • anonymous
The weight W of an object varies inversely as the square of the distance d from the center of the earth. At sea level (3978 mi from the center of the earth), an astronaut weights 122 lb. Find her weight when she is 186 mi above the surface of the earth and the spacecraft is not in motion. Her weight is _ lb
Mathematics
katieb
  • katieb
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amistre64
  • amistre64
so we are using 3978 as our earth center distance eh... some books use 4000
amistre64
  • amistre64
inversely proportional means that as one gets more, the other gets less. and we solve it with a fraction: y = 1/x is an inverse proportion
amistre64
  • amistre64
we also use a number "k" as a constant in the equation to even the two out, otherwise itsd just be nonesense

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anonymous
  • anonymous
............this is deep
amistre64
  • amistre64
W = k/(d^2) 122 = k/(3978)^2 k = 122((3978)^2) k = 19,305,870,48
amistre64
  • amistre64
lol.... its in space, thats like the opposite of deep :)
amistre64
  • amistre64
W = 19,305,870,48 // d^2 W = 19,305,870,48 // (3978+186)^2 W = 19,305,870,48 // 17,338,896 W = 111.344 lbs if I did it right
anonymous
  • anonymous
.........
anonymous
  • anonymous
YES!
amistre64
  • amistre64
is that a right or a wrong lol if its the same program as the other girl that was here; try 111.34
amistre64
  • amistre64
i take that for a correct lol
anonymous
  • anonymous
Can you that one more time?
anonymous
  • anonymous
My friend Kelley is on here.......and has the same question, just different numbers
amistre64
  • amistre64
I dont know..... the rules change with every iteration of doing the math so it could get tricky.......... ;)
anonymous
  • anonymous
Lol, she is pissed that you got it right for me
amistre64
  • amistre64
hah!! its these big brains in this tiny little head lol
anonymous
  • anonymous
Hey, it seems to work.........ok hers is.....
anonymous
  • anonymous
her astronaut weights 130 lbs
anonymous
  • anonymous
this stuff is nuts
amistre64
  • amistre64
if I start throwing "pi" around like a clown, just shoot me!!
anonymous
  • anonymous
lol ........wow....... math joke.
amistre64
  • amistre64
is that the only difference in numbers? 130 lbs?
anonymous
  • anonymous
One more thing her astronaut is 173 miles above the surface of the earth
amistre64
  • amistre64
ok.... let me crunch some numbers, do the hokey pokey and turn myself about.....
anonymous
  • anonymous
What is the hokey pokey really IS what it's all about?
amistre64
  • amistre64
W = k/(d^2) 130 = k/(3978)^2 k = 130((3978)^2) k = 2,057,182,920 ------------------------- W = 2,057,182,920 // d^2 W = 2,057,182,920 // (3978+173)^2 W = 2,057,182,920 // 17,230,801 W = 119.38986 lbs so I would put in... 119.39 as an answer if not, then 119.38
amistre64
  • amistre64
as a kid, it was either the hokey pokey are duck duck goose :)
amistre64
  • amistre64
rock paper scissors hadnt been invented yet lol
anonymous
  • anonymous
lol
anonymous
  • anonymous
She says youre awesome!
amistre64
  • amistre64
now now... she only says it cause its true :)
amistre64
  • amistre64
or shes having a stroke....have her repeat the alphabet just to be sure ;)
anonymous
  • anonymous
She couldnt do that anyways!
anonymous
  • anonymous
We only have like two weeks left.........
amistre64
  • amistre64
......cancer?
anonymous
  • anonymous
almost.........math class.
anonymous
  • anonymous
I have one more............ o........wait......
anonymous
  • anonymous
Well, thanks!
amistre64
  • amistre64
type in a new post ;) that way more people can have a chance to help.... they are jealous of my fan count I just know it ;)

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