If a Rock Contains 70% Uranium-238,you Would Estimate It to Be

question 58

Multiple Choice

If a rock contains 70% uranium-238,you would estimate it to be about ____ billion years old.

• A) 13.5
• B) 9
• C) 1
• D) 6.75
• E) 2.25

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Definitions:

Round

Rounding is the process of adjusting a number to a nearby value that is shorter, simpler, or more explicit, often to a specified number of decimal places or significant digits.

Completing the Square

A method used in algebra to solve quadratic equations by converting the equation into a perfect square trinomial.

Completing The Square

A method used to solve quadratic equations by adding a constant term to both sides to form a perfect square trinomial.

Compounded Annually

The process of calculating interest on both the initial principle and the accumulated interest of previous periods once per year.