The value of 2^11 is how many times greater than 2^7? *

Expressions A, B, and D

Step-by-step explanation:

Expression A works because anything to the power of 0 is equal to one. Therefore, 1/1 = 1.

Expression B works because a negative number that is put to an even-numbered power will end up being positive. Therefore, -1*-1*-1*-1 = 1.

Expression C does NOT work because a negative number that is put to an odd-numbered power will end up being negative (-1*-1*-1*-1*-1*-1*-1 = -1).

Expression D works because positive 1 put to any power will end up being 1, for 1 times itself will end up being 1. Therefore, (you get the idea).

Expression E does NOT work because a number put to a negative power will end up becoming a fraction. 13^-1 is the same thing as writing 1/13. Therefore, 1/(1/13) will equal 13.

Hope this helps!