tolong dibantu ya terima kasih

v = -3t^2 + 8t + 2
t = 2 s
s = ...?

s = v . t
cari v dengan cara mensubtitusikan nilai t

v = -3t^2 + 8t + 2
v = -3 (2)^2 + 8 (2) + 2
v = -3 . 4 + 16 + 2
v = -12 + 16 + 2
v = 6 m/s

Masukan ke rumus

s = v . t
s = 6 . 2
s = 12 m

Jawaban D.

[tex]\displaystyle s=\int\limits^2_0-3t^2+8t+2\,dt\\s=\left-t^3+4t^2+2t\right|^2_0\\s=-2^3+4(2)^2+2(2)+0^3-4(0)^2-2(0)\\s=-8+16+4+0-0-0\\\boxed{\boxed{s=12\,\text{m}}}[/tex]