Answer:
C. Both expressions involves addition.
Step-by-step explanation:
Option C: 
The last two terms given of the standard polynomial are:

This shows 2 patterns to us:
r 's degree is increasing per term in the given polynomial.
s 's degree is decreasing per term in the given polynomial.
The sum of powers of variates r and s is 2+4 = 3+3 = 6.
And since standard polynomial, the same pattern must be present in all terms of the series.
All options except C are not valid.
Option C has term
for which r's degree plus s's degree is 1 + 5 = 6.
And r's degree 1 < s's degree 5.
Thus its a valid term to be putted as first term in standard form of polynomial in consideration.
Thus Option C:
is the needed expression.
Learn more here:
brainly.com/question/10127580
Answer:
A. 56 cubes
B. 1/27 cm³
C. 8/9 cm³
Step-by-step explanation:
I think it would be 90? Wait for other answers by smarter people than me haha.
Answer:
I think it's 0.04
Step-by-step explanation:
Each 10 years the pupil gets smaller by 0.4 millimeters
If you divide 0.4 by 10 you get 0.04 which should be millimeters per year
again dont take my word for it im not a goddess lol