Answer:
85,999,999.999β999β909
Step-by-step explanation:
The expression represents the difference of a relatively large number and one that is relatively small. That difference is approximately the value of the large number. The exact value requires 17 digits for its proper expression. Most calculators and spreadsheets cannot display this many digits.
The numbers in standard form are ...
86,000,000 = 8.6Γ10^7
0.000000091 = 9.1Γ10^-8
Their difference is ...
86,000,000 -0.000000091 = 85,999,999.999β999β909
In scientific notation, this is ...
8.599β999β999β999β990β9Γ10^7
