Final answer:
The age of the dinosaur fossil, 92,170,000 years old, in scientific notation with the highest level of precision is 9.21700 × 10^7.
Step-by-step explanation:
To express the age of a dinosaur fossil which is 92,170,000 years old in scientific notation with the highest level of precision, we first identify the significant figures in the number and then format it so that we have a single non-zero digit to the left of the decimal point, followed by the other significant figures, and then multiply by 10 raised to the power of the number of places the decimal has moved.
In this case, the number 92,170,000 has five significant figures, and we would need to move the decimal place seven spaces to the left to get a number between 1 and 10. Thus, we write it as 9.21700 × 107. This is the scientific notation with the highest level of precision for the given age of the dinosaur fossil.