Which of the following is using the product rule for exponents correctly?
A- 5^3 x 5^7 = 5^21
B- 12^6x 12^-5 = 12
C- 8^2 x 8^10 = 16^12
D- 36^6 x 32^3 = 32^3
None of the options are using the product rule for exponents correctly.
The correct use of the product rule for exponents would be to add the exponents together when multiplying two numbers with the same base.