Adriver who drives at a speed of r mph for t hr will travel a distance d mi given by dequalsrt mi. how far will a driver travel at a speed of 57 mph for 8 hr?

At a speed of 57 mph for 8 hr a driver will travel 456 mi

Step-by-step explanation:

Here we have a summary of the letters for each variable:

Speed ---> r          (in units of mph)

Time ---> t            (in units of hr)

Distance ---> d     (in units of mi)

These three variables are related by the next formula:

d = rt

In the data they give to you: 57 mph and 8 hr, they are telling you the r and the t, respectively:

r = 57 mph

t = 8 hr

The only thing you have to do is replace the values:

d = rt    >     d = 57 mph x 8 hr

                        d = 456 mi