Which statements are true regarding the expression below? 8⁻¹· 8⁻³· 8 .
a) The last factor, 8, with no exponent shown is equivalent to 8⁰
b) The sum of the exponents is -3. The value of the expression is -512.
c) The value of the expression is 1/512
d) An equivalent expression is 8⁷· 8⁻¹⁰
e) An equivalent expression is 8⁻²· 8⁻²