rosie is evaluating the sum 3+7+12+8 and decides to add 3 and 7 together and 8 and 12 together before finally adding both results. which of the following allows her to do this initial grouping

Can you me find the missing length. i attached an image.

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 given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.