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Across 1. expressed as √. 3. also known as the Principal. 7. expressed as log( 8. in an exponential decay situation, the time it takes for a quantity to decay to half its original amount. 14. an equation with a variable exponent. 15. the formula for this is A = Pe^rt

Down 2. a transformation under which a variable x is replaced by log x. 4. a function which maps x onto log(x)/log(b) for a fixed b and all positive real numbersx. 5. in an investment, the percent by which the principal is multiplied to obtain the interest paid to the investor. 6. the value if this is 10. 9. a situation that can be modeled by an exponential function f(x)=ab^x with base b>1. 10. a function with a formula of the form f(x) = ab^x, where a ≠ 0, and b ≠ 1. 11. a situation that can be modeled by an exponential function f(x)=ab^x with base 0<b<1. 12. In an exponential growth situation, the base of the exponential function. 13. a function with an equation of the form y=x^1/n.