7/9 + 5/12 with lcm pls help and give explanation pls
2 answers:
Step-by-step explanation:
1. ) 7/9 multiply x 4 and 5/12 multiply x 3 , to get the same denominator( bottom number)
2.) once you multiply 7/9 by 4 you should get 28/36 and once you multiply 5/12 by 3 you should get 15/36
3.) Now add the numerator( top numbers) so add 15 and 28 = 43
4.) Next put 43 as the numerator(top number) and 36 as the denominator (bottom number) = 43/36
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6.665 grams of the 13 grams remain after 8 hours.
<h3>How much of a 13 gram sample of iron-52 would remain after 8 hours?</h3>The decay equation for the 13 grams of iron-52 is:
Where N is the amount of iron-52, and t is the time in years.
Where we used the fact that the half-life is exactly 8.3 hours.
Now, the amount that is left is given by N(8h), so we just need to replace the variable t by by 8 hours, so we get:
So 6.665 grams of the 13 grams remain after 8 hours.
If you want to learn more about half-life:
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