3. for the following geometric sequence, determine a1 and r and find an explicit formula for the sequence: 2, -6, 18, -54… a. what is a1? b. what is the common ratio r? c. write an explicit formula for an using the formula for geometric sequences an = a1*(r)n – 1.

In what organelle does photosynthesis take place?

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

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