Saturday

April 18, 2015

April 18, 2015

Posted by **Shay** on Wednesday, March 17, 2010 at 5:39pm.

- Math (FST Exponential & Logarithm) -
**Reiny**, Wednesday, March 17, 2010 at 7:35pmsubbing in the 2 points gives us

1) 120 = a(b)^9

2) 216 = a(b)^12

divide 2) by 1)

216/120 = b^12/b^9

b^3 = 9/5

b = (9/5)^(1/3) = 1.2164

put this back into 1)

120 = a(1.2164)^9

a = 20.5761

y = 20.5764(1.2164)^x

(I checked for (12,216), it works)

**Answer this Question**

**Related Questions**

Math (FST Exponential & Logarithm) - What is the amount and type of the growth ...

Math (FST Exponential & Logarithm) - What is the range of y= -(2)^(x-3)

Calculus - Solve the exponential equation for t. Round your answer to three ...

math - Use exponential regression to model the price P(t) as a function of time ...

Help Please Stat-Math - According to an airline, a particular flight is on time ...

math - Find equations for exponential functions that pass through the given pair...

Logarithm - The rate of auto thefts triples every 6 months. (a) Determine, to ...

Probability - Suppose X has an exponential distribution with . Determine the ...

Calculus - Given y=log(x), what is dy/dx? If you have to derive this from first ...

math - change the exponential expression to an equivalent expression involving a...