Which volume formula of formulas show a join variation ? 1. V=s^3 2. V=pr^2h 3. V=Bh

Question

Help please, I can't figure it out

Answer 1

Lipton,

 

1. V = s³

2. V = pr²h

3. V = Bh

 

Joint variation means that V will be dependent on at least two different variables. Looking at the three choices, only 2 and 3 show this.

 

In 2, V varies jointly as r² and h (assuming p is the constant of proportionality). And in 3, V varies jointly as B and h, with the proportionality constant being 1.

 

Let me know if you need more explanation or have any questions.