Saturday

September 20, 2014

September 20, 2014

Posted by **Kate** on Sunday, February 28, 2010 at 6:45pm.

please help!!! i don't even understand how to approach this problem! =(

- Math--Exponential Functions -
**MathMate**, Sunday, February 28, 2010 at 7:30pmInitial investment = $500

Investment value after 15 years

= $500*2

= $1000 (doubles)

15 more years later (30), value of investment

= $1000 * 2

= $2000 (doubles from 15 years ago)

I will leave it to you to calculate the value of investment at 45 years from the initial investment.

Mathematically, let P = initial principal,

2P = PR^15 (R=interest rate)

R=e^(ln(2)/15)=1.047294123

Value of investment after N years,

V(N)=$500*R^N

for N=15,

V(15)=$500*1.047294123^15

=$1000.00

V(30)=$500*1.047294123^30

=$2000.00

and so on.

- Math--Exponential Functions -
**professor**, Tuesday, March 23, 2010 at 10:36pmafter 30 yrs the investment is worth $2,000

after 45 yrs the investment is worth $4,000

**Answer this Question**

**Related Questions**

math - Suppose an investment of $2,300 doubles in value every decade. The ...

exponential function - An investment pays 8% interest, compounded annually. a) ...

Math - Suppose an investment of $2,300 doubles in value every decade. The ...

Math-Exponential functions - An investment of $5,000 is made with three options:...

Finance - If an investment of $5,000 today earns 5% in each of the next five ...

finance - 4. a. Someone in the 36 percent tax bracket can earn 9 percent ...

Financial Math - An investment of $2500 accumulates at 6% p.a compounded semi ...

Trigonometry - The value V, of a $100,000 investment that earns 3% annual ...

Algebra word problem - please help me with the following: The value of a ...

Maths B - Kate is thinking about investing $45000 for 5 years. She deposits her ...