Which similarity statements describe the relationship between the two triangles check all that apply

PRS~XYZ
RSP~ZXY
SRP~XZY
PSR~YXZ
RPS~ZYX
SPR~XZY

What value of x will make the triangles similar by the sss similarity theorem?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)