Final answer:
The quotient of 3.91 x 10⁷ and 2.3 x 10² is 1.7 x 10µ when expressed in scientific notation.
Step-by-step explanation:
The quotient of 3.91 x 10⁷ and 2.3 x 10² expressed in scientific notation is calculated by dividing the coefficients (3.91÷ 2.3) and subtracting the exponents (7 - 2). Performing the division gives 1.7 (rounded to two significant figures), and the subtraction of the exponents gives 5. Therefore, the quotient in scientific notation is 1.7 x 10µ.