<span>As the age of the U-235 sample is 2.631 billion years, and the half-life of U-235 is 713 million years, the sample has undergone 2.361 X 1,000,000,000 / 713 X 1,000,000 = 3.69 half lives. In each half-life the sample reduces to half its original weight according to the radioactive Half-Life Formula:
ln (Nt /N0) = -kt, where N0 = mass of the original weight of radioactive material, Nt = mass of radioactive material at time t, k = decay constant and t = time interval . We have to put Nt/N0 = 1/2 for time interval = half-life.</span>
Answer: x intercept is -3
y intercept is -9
Step-by-step explanation: 6(0) = 2y=-18, divide both sides by 2, get -9 as a y intercept
6x+2(0)=-18
divide both sides by 6, and get -3 as an x intercept
Hello there! :)
Answer:
1. 
2. 
Step-by-step explanation:
1. 3/5+4/15
First, you multiply by numerator and denominator.
3*3=9
5*3=15
Then, you had to combine by the fractions.
Add by the numbers from left to right.
9+4=13
<u><em>13/15 is the final answer.</em></u>
______________________________________________
2. 5/6-1/4
First, you multiply by 2 both sides of numerator and denominator.
5*2=10
6*2=12
10/12
3/12
Subtract by the numerator.
10-3=7
<em><u>7/12 is the final answer.</u></em>
______________________________
Hope this helps!
Thanks!
Have a nice day! :)
:D
-Charlie
Answer:
7. b
8. a
Step-by-step explanation:
Answer:
4 +(r/5)
Step-by-step explanation:
