Question 927557
According to the distance formula:
{{{ d=rt }}}

We can assume from the problem that 
{{{ d = 3 }}}
{{{ t = 4 }}}
So, we plug in the distance and time into the formula to find the rate first.
{{{ 3 = r(4) }}}
{{{ 3/4 = r }}} Division Property of Equality

So if r = 3/4, then we can also plug in the time of 7 minutes into the equation to find the distance traveled in 7 minutes.
{{{ d = (3/4)(7) }}}
{{{ d = 21/4 }}} Simplify