7×7
"index" is the singular form - "indices" is the plural :)
The possessive form of the singular noun index is index's.
indices or indexes
The plural form for the noun index is indexes.
40.000000 in standard index form is 4.0 × 101
Index form of 9765625 is 9.765625 × 106
5,200 in standard index form = 5.2 × 103
8890 in standard index form = 8.89 × 103
10/49 is in its simplest form.
12/49 is in its simplest form.
49/72 is in its simplest form.
The singular is the noun "index".