A sample has a half-life of 1000 years. 1/2 of the isotopes are parents. How old is it?
2 answers:
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<h2>Answer- P=<u>18</u></h2>
Step-by-step explanation:
Greetings !
Firstly, find the class-midpoints (X) to solve for the mean.
Thus, mid points of each classes are
Solve, for <em>p</em><em> </em>using mean grouped data formula
multiply each values add them and solve for <em>p</em><em>.</em>
<em></em>
make a cross multiplication
subtract 270 from both sides
subtract <em>24</em><em>p</em><em> </em>from both sides
Also refer the attached image for further details
Hope it helps!
Answer:
Step-by-step explanation:
From the question we are told that:
Five-dollar bill x
One-dollar bill y
Total number of bills
Worth of bills
Generally the equation for Total number of bills is mathematically given by
Since it is made up of five and one dollar bills
Therefore
Hence the Equation for Total worth of bills is
The System of equations used is