Question

x(t) = −4t2 + 20t + 64 and r=-8t^2+40t+128. what is (r dot x)(t)? times? and how do I do that?

Answer 1

composition

Answer 2

place the x(t) equation inside the r(t)

Answer 3

\[r o x (t) =-8(-4t^{2}+20t+64)^{2}+40(-4t^{2}+20t+64)+128\]

Answer 4

then do allll of that out right?

Answer 5

this seems really excessive?