You find a rock containing a mixture of element and lead. you determine that 20% of the orignial element remain; the other 80% decayed into leads. how old is the rock?

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Find the pattern and use inductive reasoning to predict the next number in the sequence 100, 120, 60, 80, 40,

Determine the equation for the given line in slope-intercept form y=- r-1 y = 5x + 1 y=-3x-1 hint