Simplify the expression (-x)^5(4x)^2? a)-16x^7b)-16x^10c)-8x^7d)16x^10

I'm terrible at math any here is appreciated.

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm^2. what is the area of the second triangle?

Arectangular lawn is 65 m long and 34 m wide. over time, people have walked along a diagonal as a shortcut and have created a straight path. what is the length of the path, to the nearest tenth of a meter? enter your answer as a deicmal in the box. m