You deposit $500 in an account that earns simple interest. The difference between the total interest earned after 3 years and the total interest earned after 1 year is $30. What is the annual interest rate? please show formula as well

p.a.

Step-by-step explanation:

The formula for simple interest is ( interest, principal, rate)

First, let's express the interest earned in one and three years:

(finding the interest earnt in one year)

(finding the interest earnt in three years)

From the information "The difference between the total interest earned after 3 years and the total interest earned after 1 year is $30", we can write:

p.a.

∴ The annual interest rate is

Hope this helps :)

answer: d. $20

step-by-step explanation:

just took the test

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.