Question

Assume that t varies jointly as r and q2². If t=320 when r=5 and q = 4, what is the value of q when r= 1 and t= 196?

q=

Answer 1

Explanation:

`t = k(r)( {q}^(2) )`

`320 = k(5)( {4}^(2) )`

`320 = 80k`

`k = 4`

`196 = 4(1)( {q}^(2) )`

`49 = {q}^(2)`

`q = 7`