# math

posted by .

at what rate of interest a certain sum will be doubled in 8 year?

## Similar Questions

1. ### math review question

The interest rate on an equity line of credit was 6 3/4 % last year. This year the interest rate is 9 1/2 %. How many percentage points has the interest rate increased?
2. ### Math

Suppose that \$2500 is invested at an interest rate of 2.5% per year, compounded continuously. After how many years will the initial investment be doubled?
3. ### math

If the interest on a sum is compounded quarterly, which of the following is necessarily true?
4. ### maths

A sum of money becomes 8/5 of itself in 5 years at certain rate of simple interest. Find the rate of interest.
5. ### maths

The compound interest on a certain sum for 2 years is Rs 41 and simple interest is Rs 40.Then the rate per annum is
6. ### Maths urgent

a sum of money is invested for 3 years at a certain rate of interest. had the rate of interest been 1% more, it would have fetched rs 18 more than before. find the sum invested?
7. ### help!!

An investment banker received a bonus and invested that money in two investments. He put a certain sum of money in the first investment that returned 7% interest after one year. In the second investment he invested four times that …
8. ### simple interest and compound interest

the compound interest on certain sum for the third year and fourth year is rs.1815 and rs 1996.50 respectively. what is the annual rate of interest
9. ### Business mathematics

A sum of money when invested for a definite period at r% simple interest will yield an interest of rm80 .using the same interest rate, find the interest earned if the sum is tripled and the investment period is doubled
10. ### math

A sum of money becomes 85 of itself in 5 years at a certain rate of interest. The rate percent per annum is :

More Similar Questions

Post a New Question