Find the difference. (9a^4+2a^2+-7a^2+1)
a. 25a^4-5a^2-4
b. -7a-5a^2+6
c. 25a^8+9a^4+6
d. -7a^4+9a^2+4

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.