0, 1, 3, 6, 10, 15, 21, what is the next number

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

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 candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy. how much will she pay after the discount