Question

If R: 1/3

S: 1/4
can you explain step by step. please. I did it, but my answer was wrong. app shows is 12. but I don't know what I did wrong. ​

Answer 1

12

Explanation:

`\frac{ {r}^( - 2) }{3 \: . \: s} \\ \frac{ { ((1)/(3)) }^( - 2) }{3 \: . \: (1)/(4) } \\ \frac{1}{3 \: . \: (1)/(4) \: . \: { ((1)/(3)) }^(2)} \\ (1)/(3 \: . \: (1)/(4) \: . \: (1)/(9) ) \\ (1)/( (1)/(12) ) \\ 1 / (1)/(12) \\ 1 * 12 \\ 12 \\`