9 decreased by 4 times a number

Ihonestly have no clue if it's each or none.

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

The height of a box can be found by dividing its volume by the area of its base, bottom. what is the height of a box that has a volume of 26.35 cubic centimeter and a base area of 4 1/4 square centimeter?