the half life of potassium-40 (k-40) is 1.25 billion years. if you begin with 130 g of k-40 how much remains after 2.5 billion years?

Let r = 3. what is the value of r + 58?

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

How does the graph of g(x)=⌊x⌋−3 differ from the graph of f(x)=⌊x⌋? the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted right 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted up 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted down 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted left 3 units.