Which of the following statements about closure is NOT true?

Polynomials are closed under addition.
Polynomials are closed under subtraction.
Polynomials are closed under multiplication.
Polynomials are closed under division.

If someone could help that would be greatly appreciated

Atype of plant is introduced into an ecosystem and quickly begins to take over. a scientist counts the number of plants after mmonths and develops the equation p(m)= 19.3(1.089)^m to model the situation. most recently, the scientist counted 138 plants.assuming there are no limiting factors to the growth of the plants, about how many months have passed since the plants werefirst introduced? a)o 6.1b)0.6.6c)10 72d)o 23.1