9.07 x 12 and 12.015 x 0.14

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

The formula for the volume of a right square pyramid is given below, where a is the side length of the base and h is the height.

Multiply and simplify 2x^2 y^3 z^2 · 4xy^4 x^2