In which expression should the exponents be subtracted

A. (6 to the 10th power) to the -7 power
B.2 to the 9th power over 5 to the 9th power
C.(-1/2) to the 11th power times (-1/2) to the -4 power
D.3 to the 8 power over 3 to the 5th power

Question

In which expression should the exponents be subtracted

A. (6 to the 10th power) to the -7 power
B.2 to the 9th power over 5 to the 9th power 
C.(-1/2) to the 11th power times (-1/2) to the -4 power 
D.3 to the 8 power over 3 to the 5th power

welshfella · Answer

The exponents are subtracted  when the exponential terms are DIVIDED.

welshfella · Answer

for example 

3^4 / 3^2  = 3^(4-2)

Note also that the 'base' numbers ( in this case 3) must be the same.

mgcanez · Answer

So d?

welshfella · Answer

yes

welshfella · Answer

b is a division but the base numbers are not th same.

welshfella · Answer

Good job.