Two brothers, Mark and Brian, each inherit $39000
.  Mark invests his inheritance in a savings account with an annual return of 2.1%
, while Brian invests his inheritance in a CD paying 5.6%
annually. How much more money than Mark does Brian have after 1
year?

To determine how much more money Brian has than Mark after one year, we first calculate the amount each brother has after one year, then find the difference between the two amounts.

### Mark's Investment:
Mark invests $39,000 at an annual return of 2.1%.

\[
\text{Amount Mark has after 1 year} = 39000 + (39000 \times 0.021) = 39000 \times (1 + 0.021) = 39000 \times 1.021 = 39819
\]

### Brian's Investment:
Brian invests $39,000 at an annual return of 5.6%.

\[
\text{Amount Brian has after 1 year} = 39000 + (39000 \times 0.056) = 39000 \times (1 + 0.056) = 39000 \times 1.056 = 41184
\]

### Difference in Amounts:
The difference between the amounts that Brian and Mark have after one year is:

\[
\text{Difference} = 41184 - 39819 = 1365
\]

So, after one year, Brian has **$1,365** more than Mark.

Would you like more details or have any other questions?

Here are some related questions:
1. How would the difference change if Mark's interest rate increased to 3%?
2. What would be the difference after 5 years instead of 1 year?
3. How much would each brother have after 10 years with their respective interest rates?
4. How does the difference change if both brothers invest in the same type of account?
5. What if the interest rates were compounded monthly instead of annually?

**Tip:** The higher the interest rate and the longer the time, the more significant the difference in returns between two investments.

Explore how much more money Brian has than Mark after one year due to different investment strategies. Mark invests at 2.1% annual interest, while Brian opts for a CD paying 5.6% annually. Get a detailed solution with calculations and understand the impact of interest rates on investments.

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