jenny invests $250 at a rate of 8% and earns $40.how long did she leave her money invested?

250 * 0.08 = $20

40 / 20 = ?

2 years

To find out how long Jenny left her money invested, we can use the formula for simple interest:

Interest = Principal * Rate * Time

Given that Jenny invests $250 at a rate of 8% and earns $40, we can plug in the values to solve for Time:

$40 = $250 * 8% * Time

First, convert the percentage to a decimal by dividing it by 100:

8% = 8/100 = 0.08

Now, substitute the values into the equation:

$40 = $250 * 0.08 * Time

Next, divide both sides of the equation by $250 * 0.08 to isolate Time:

Time = $40 / ($250 * 0.08)

Calculating the expression gives:

Time = $40 / $20

Simplifying further, we get:

Time = 2

Therefore, Jenny left her money invested for 2 time units. However, without specific information about the time units, we cannot determine if it is in days, months, or years.