What do scientist use the H-R Diagram for and how do they use it?

Which excerpt from act iv of hamlet best provides evidence of the theme’s development?

Among the following environmental factors, which does not have a long-term impact on the composition of a region's soil? a. kinds of crops grown b. types of fungi present c. topography of the landscape d. variety of species of mammals e. number of freezes occurring annually

Find the area of a triangle with a = 174 b = 138 and c = 188 round to the nearest tenth