



New Member


Mar 3, 2013, 11:08 PM


Ocean crust rate question
How long would it take to form 2,000 kilometers of ocean crust at a rate of 5 centimeters per year?
Answer
A) 10 million years
B) 20 million years
C) 30 million years
C) 40 million years
I'm not asking for an answer, but I'd appreciate help in solving it. I don't know how to figure it out. Much appreciated! Cheers



Jobs & Parenting Expert


Mar 3, 2013, 11:16 PM


Change kilometers to centimeters, or vice versa, so you have the same unit of measure.
5cm = 0.000050000km



New Member


Mar 3, 2013, 11:21 PM


Originally Posted by Wondergirl
Change kilometers to centimeters, or vice versa, so you have the same unit of measure.
5cm = 0.000050000km
So would it be 10 million years? Do I just divide it or what?



Jobs & Parenting Expert


Mar 3, 2013, 11:23 PM


Originally Posted by tconnection360
so would it be 10 million years? do i just divide it or what?
What grade are you in?



New Member


Mar 3, 2013, 11:25 PM


Originally Posted by Wondergirl
What grade are you in?
11th.. please help! I'm really stressing out on this question



Jobs & Parenting Expert


Mar 3, 2013, 11:26 PM


Is this for homeschooling or real school?



Jobs & Parenting Expert


Mar 3, 2013, 11:28 PM


5 cm = 1 year
0.00005 km = 1 year



New Member


Mar 3, 2013, 11:28 PM


Originally Posted by Wondergirl
Is this for homeschooling or real school?
Real school. I really need help in solving this.. please please please. I'd greatly appreciate it!



Jobs & Parenting Expert


Mar 3, 2013, 11:36 PM


Seems like I am doing the entire problem for you.
5 cm = 1 year
0.00005 km = 1 year
Flip the last equation around and plug in each year amount to find out how many kms.
1 year = 0.00005 km.
2 years = ?
10,000,000 years = ?



New Member


Mar 3, 2013, 11:45 PM


Originally Posted by Wondergirl
Seems like I am doing the entire problem for you.
5 cm = 1 year
0.00005 km = 1 year
Flip the last equation around and plug in each year amount to find out how many kms.
1 year = 0.00005 km.
2 years = ?
10,000,000 years = ?
So I multiplied it for 2,000 km and it was .1 so its 10 million years! Correct?



New Member


Mar 3, 2013, 11:54 PM


Originally Posted by Wondergirl
Seems like I am doing the entire problem for you.
5 cm = 1 year
0.00005 km = 1 year
Flip the last equation around and plug in each year amount to find out how many kms.
1 year = 0.00005 km.
2 years = ?
10,000,000 years = ?
Oh wait is it 40 million years?



Jobs & Parenting Expert


Mar 4, 2013, 12:05 AM


10,000,000 years = 10,000,000 x 0.00005 = ?



New Member


Mar 4, 2013, 12:08 AM


Originally Posted by wondergirl
10,000,000 years = 10,000,000 x 0.00005 = ?
500...



Jobs & Parenting Expert


Mar 4, 2013, 12:14 AM


So 10 Million years would be only 500 km. of ocean crust.



New Member


Mar 4, 2013, 12:25 AM


Originally Posted by Wondergirl
So 10 Million years would be only 500 km. of ocean crust.
Gotcha.. 40! Thanks so much


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