A polynomial of degree 4 in y has at most A: 4terms
B: 3terms
C: 5 terms
D: 8 terms

C.

Step-by-step explanation:

The highest term must be of x^4, then decreasing to x^3, x^2, x and the constant term.

Altogether there are at maximum 5 terms.

1/4 and 8/3 because:

the reciprocal if 4 is 1/4 because 4 is used as 4/1 and the opposite of that is 1/4. the opposite of 3/8 is 8/3 so that is the answer.