A grocery store wonders if their sales will be better if they play ambient music or no music at all. Each day for 222 months, the manager flips a coin to determine whether or not the store will play music that day. At the end of the 222 months, the manager finds that, on average, sales were significantly better on days where music was playing. What conclusion can they draw from this study?

john earns $14.00 for two hours of work.

the answer to this is a. a^2 + b^2 = c^2

answers

\3. yes the presentation (i.e. odd numbers being written as differences of two squares) is possible for all odd natural number however the presentation may not be unique. for example,  57=112−82=292−28257=112−82=292−282.

\4. 2 can't be written as a difference of two squares because 4-1=3 and 1-1=0 and the difference of squares grows to integers larger that 3.

can i get some in proving questions 1 and 2?