The power g to the negative second power is equivalent to 1/g to the second power. what is the value g to the negative second power?
-81
-9
1/81
1/9

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.