-4
0.5
No.
4-3 = 1/64
10-4 = 1/104 = 0.0001
It equals 1
1/2
3.2x10-4 or 0.00032
36 - 16 = 20
4^(-2) = 1/4^2 = 1/16.
when you're doing a problem like that use this trick. let's say you have 3 to the -7 power minus 3 to the 4 power. -7 - 4 can also be shown as -7 + -4. i switched the minus sign to a plus sign and because i did that, i had to switch the positive 4 to a negative 4. so i got 3 to the -7 power plus 3 to the -4 power.
'x' is +4 or -4 .