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To solve this problem, let's break it down:

The initial investment (principal) was $100, and it earns 7% interest compounded semiannually (twice per year). We are asked to calculate how much the bond is worth 17 years later.

### Step 1: Formula for compound interest
The formula for compound interest is:

\[
A = P \left(1 + \frac{r}{n}\right)^{nt}
\]

Where:
- $A$ is the amount of money accumulated after $t$ years, including interest.
- $P$ is the principal (initial investment).
- $r$ is the annual interest rate (7% or 0.07).
- $n$ is the number of times the interest is compounded per year (semiannually means $n = 2$).
- $t$ is the time the money is invested for in years (17 years).

### Step 2: Plug in the values
Let's plug the values into the formula:
- $P = 100$
- $r = 0.07$
- $n = 2$
- $t = 17$

Now, we calculate the final value $A$.

Let me calculate it for you.After 17 years, the bond will be worth approximately \$322.09.

### Step 3: Check if the bond has matured
A mature bond is said to double its initial investment. Since the initial investment was \$100, the bond would need to reach \$200 to be considered matured. Since the final value is approximately \$322.09, which is more than double the initial investment, the bond has indeed matured.

Therefore, the answer to the question "Had the bond matured?" is **Yes**.

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Do you want more details or have any questions? 

Here are five related questions to expand on this topic:
1. How would the final amount change if the interest were compounded quarterly instead of semiannually?
2. What would be the value of the bond if the interest rate were 5% instead of 7%?
3. How much would the bond be worth after 10 years under the same conditions?
4. What is the difference in total amount if the interest were compounded annually instead?
5. How does changing the time period from 17 years to 20 years affect the maturity?

**Tip**: The more frequently interest is compounded, the higher the final value will be due to compounding effects.

In 1995, a woman purchased a savings bond for her granddaughter's education. She paid $100 for the bond, which earned 7% interest, compounded semiannually. How much was the bond worth 17 years later, when her granddaughter graduated from high school? A mature bond is double the initial investment. Had the bond matured?

Calculate the final amount of a $100 bond with 7% interest compounded semiannually over 17 years. This problem demonstrates the use of the compound interest formula, showing that the bond matures by more than doubling its value.

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