The half-life of uranium 238 is 4.5 billion years. if 98% of uranium 238 remains in a fossil, how old is the fossil?

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Use mathematical induction to prove the statement is true for all positive integers n, or show why it is false. 1^2 + 4^2 + 7^2 + + (3n - 2)^2 = [n(6n^2-3n-1)/2]

Find the slope of the line that passes through the points (0, 0) and (-2, -3). 2/3 3/2 -3/2