There are 40 entries in the science fair how many ways can they finish in first second and 3rd place. a.240
b. 1,480
c.12,640
d.59,280

ljn

step-by-step explanation:

c. he organized a political resistance group based on islam.

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?