Find the missing length indicated. 8) Find HJ.

9) A segment has endpoints at (-4, -3) and (16, 7). Find TWO possible locations for point P that divide the segment into the ratio 3:7.
a) (3.-1)
b) (2,0)
c) (13,4)
d) (10,4)
e) (3,0)
hello can someone pls help me out with these ty.

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 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)