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

Step-by-step explanation:

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

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

$320 = 80k$

$k = 4$

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

$49 = {q}^{2}$

$q = 7$