November 21, 2020

Chapters

## Exercise 1

How long does it take a principal of dollars at a simple interest rate of to become dollars?

## Exercise 2

dollars is deposited into a savings account. After one year, months, and days it totals dollars. Calculate the simple interest rate for this account.

## Exercise 3

Determine the simple interest rate applied to a principal over years if the total interest paid equals the borrowed principal.

## Exercise 4

How long does it take a principal payment to triple at a simple interest rate of ?

## Exercise 5

Find the total amount of simple interest that is paid over a period of five years on a principal of dollars at a simple interest rate of .

## Exercise 6

Calculate the total worth of an investment after six months with a principal of dollars at a simple interest rate of .

## Solution of exercise 1

How long does it take a principal of dollars at a simple interest rate of to become dollars?

years

## Solution of exercise 2

dollars is deposited into a savings account. After one year, months, and days it totals dollars. Calculate the simple interest rate for this account.

days

dollars

## Solution of exercise 3

Determine the simple interest rate applied to a principal over years if the total interest paid equals the borrowed principal.

## Solution of exercise 4

How long does it take a principal payment to triple at a simple interest rate of ?

years

## Solution of exercise 5

Find the total amount of simple interest that is paid over a period of five years on a principal of dollars at a simple interest rate of .

dollars

## Solution of exercise 6

Calculate the total worth of an investment after six months with a principal of dollars at a simple interest rate of .

dollars

dollars

solution to question no. 3 should be :

let the principle payment be : x

after a certain amount of time when it triples it will become 3x

over here 3x is the total amount not the interest.

when the principle triples 1 part still remains as the principle the rest of the 2 amounts is the interest

so :

let the time be y

equation 6*x*y/100=2x

y=33.33 years

Ex no . 4 *