# Math Help - Problem

1. ## Problem

how can i solve this exercise? ( The value of an investment varies according to the formula V=A^t/12,where V is the value of the investment in pounds, A is the constant to be found and t is the time in years after the investment was made. i)If the investment was worth 8000 pounds after three years,how much the value of A to the nearest pound is? ii)How much the value of the investment after 10 years will be?

2. ## Re: Problem

From
$V=A^{\frac{t}{12}}$

Raise both sides to the power of $\frac{12}{t}$

$V^{\frac{12}{t}}=A^{{\frac{t}{12}}^{\frac{12}{t}}}$

Remember the rules of indices. the indices ${\frac{t}{12}}$ and ${\frac{12}{t}}$ cancel to be just 1

$V^{\frac{12}{t}}=A^1$

You can now find A.
After you find the constant A you can do the second part easily by using the original equation at t=10

3. ## Re: Problem

shakari,,tell me what will be the answers with the data what i have written above..