Question 1179569


Suppose {{{p }}}varies directly with {{{i}}} and inversely with {{{m}}}. Write the equation to solve for {{{k}}}. 

{{{p =k*(i/m)}}}
{{{k =p/(i/m)}}}
{{{k =(pm)/i}}}

If {{{p = 30}}} when {{{i = 2.5}}} and {{{m = 6}}}, then

{{{k =(30*6)/2.5}}}
{{{k =180/2.5}}}
{{{k =72}}}

what is the value of {{{p}}} when {{{i = 4}}} and {{{m = 7}}}?

{{{p =72*(4/7)}}}

{{{p =288/7}}}-> exact solution

approximately {{{p =41.14}}}