Aparallelogram has an interior angle measuring 81°. which must also be the measure of an interior angle of the parallelogram?

a) 9°
b) 19°
c) 49°
d) 99°

Could someone me with this question i’ve been stuck on it for 20 minutes

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

Aclothing designer is selecting models to walk the runway for her fashion show. the clothes she designed require each model’s height to be no more than y inches from 5 feet 10 inches, or 70 inches. which graph could be used to determine the possible variance levels that would result in an acceptable height, x?