Question

Help!!! Medals given...
http://assets.openstudy.com/updates/attachments/528aa85be4b09a30e764ba59-agent0smith-1384819555007-question.png

Answer 1

For 1, since the readability goes down by 10% or more, then the page would be 90% or less as readable...
\[r \le 90%\] or convert 90% to a decimal, 0.9 \[r \le 0.9\]

Answer 2

2. A large background image b, is at least 30kb \[b \ge 30\]
small background image is no more than 3kb \[s \le 3\]