Final answer:
To determine the largest number among the given options, we need to rewrite them in proper scientific notation. Comparing the exponents in scientific notation, we can see that d) 8.9 x 10^5 has the largest exponent, making it the largest number among the given options.
Step-by-step explanation:
To determine the largest number among the given options, we need to rewrite them in proper scientific notation.
a) 90,000 = 9.0 x 10^4
b) 9.3 x 10^-6
c) 8.9 x 10^-5
d) 8.9 x 10^5
Comparing the exponents in scientific notation, we can see that d) 8.9 x 10^5 has the largest exponent, making it the largest number among the given options.