The element remains 7.5 minutes until there are 60 grams of the element remains.
Let “x” be the number of minutes until there are 60 grams of the element remains.
A formula based on the supplied criteria. ::
520 * (1-25.1%)^x = 60
Determine the sum or difference:
520*0.749^x
Divide both sides of the equation by the variable's coefficient:
0.749^x = 60/520
Reduce the portion as follows:
0.749^x = 3/26
Convert an exponential function to a logarithmic function :
X = log0.749 3/26
Convert decimal to fraction
X = log 749/100 3/26
Round
X = log 749/100 3/26 to the required place
X = 7.5 minutes.
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