Posted by **cody** on Wednesday, August 31, 2011 at 6:58pm.

the variable j varies jointly as the square of h and as the cube root of a, and it varies inversely as s. What happens to j when h is doubled, a is multiplied by 8, and s is multiplied by 4?

- precalculus -
**Reiny**, Wednesday, August 31, 2011 at 8:44pm
j = k(h^2)(a^(1/3)/s

when h is doubled , a multiplied by 8, s multiplied by 4

j_{2} = k (4h^2)(2a^(1/3)/(4s)

j_{2} / j = [ k (4h^2)(2a^(1/3)/(4s) ] / [k(h^2)(a^(1/3)/s]

= 4(2)/2 = 2

the value of j will double

## Answer this Question

## Related Questions

- variation - Can you please check my answers? Thanxs! Write an equation that ...
- variation - Can you please check my answers? Thanxs! Write an equation that ...
- Variation-Check Problems - Can you please check my answers? Thanxs! Write an ...
- Check my answers. Algebra - Can you please check my answers? Thanxs! Write an ...
- Pre Cal - If x varies directly as y62, inversely as z, and inversely as the ...
- Inverse Variation - Help me please.. Explain also :( 1. E is inversely ...
- Pre Cal - Ooops! I wrote it wrong, here's the problem: if x varies directly as y...
- math - t varies directly as the square root of l. If l=81, then t=10 what is the...
- Math - DIRECT VARIATION 1. a is directly proportional to b.If a=15,then b=9 2. m...
- Algebra II - If y varies directly as the square root of w and inversely as the ...