[单选题]
A jumper in the long-jumpy7td my( ,dsl8s42slp goes i8mbt)xq ,aopabe88g 8nto the jump with a speed of 12 m/s at an angle ofo8ba8qp mt a8g,b8x)e $20^{\circ}$ above the horizontal. How far does the jumper jump?
A. $6.14 \; m$
B. $8.22 \; m$
C. $9.45 \; m$
D. $10.4 \; m$
E. $12.28 \; m$
Post time 2025-9-8 22:24:32