Final answer:
To write the width in feet as an improper fraction, we need to convert the mixed number 8½ to an improper fraction. The width would be written as the improper fraction 17/2 feet.
Step-by-step explanation:
To write the width in feet as an improper fraction, we need to convert the mixed number 8½ to an improper fraction. To do this, we multiply the whole number part, 8, by the denominator, 2, and add it to the numerator, 1. The resulting numerator is 17, and the denominator remains 2. Therefore, the width of the largest ammonite found would be written as the improper fraction 17/2 feet.
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