Question 4185
assuming that 8.2 means 8 multiplied by 2, then the answer is 1--> E.


Since, log to the base 2 of 16 is 4, ie 2^4 = 16. We then have:


{{{4=8*2^(-x)}}}


{{{1/2 = 2^(-x)}}}


{{{1/2 = 1/(2^x)}}}


by looking at these 2 halves of the equation, you can see that x=1.
jon.