Answer plz?!?! and explanation plz?!?

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

Acar travels 85 kilometers per hour. what is the equivalent speed in meters per hour?

3/8 of the students in ms. mull’s class ride the bus. if there are 24 students in the class, how many students ride the bus?