Answer:
24
Step-by-step explanation:
[tex] \frac{30}{45} = \frac{16}{j} = \frac{ qr}{qs} \\ \frac{30}{45} = \frac{2}{3} \\ \frac{2}{3} = \frac{16}{j} \\ 2j = 48 \\ j = 24[/tex]
