Answer
$381 \text{ pounds}$
Work Step by Step
Substituting $x=150$ in the given function $J(x)=2.54x$, then,
\begin{array}{l}\require{cancel}
J(150)=2.54(150)
\\\\
J(150)=381
.\end{array}
Hence, the weight on Jupiter is $
381 \text{ pounds}
$.