Eugene, Brianna, and Katie are going on a run. Eugene runs at a rate of 4 miles per hour. If Brianna runs 2/3 as fast as Eugene, and Katie runs 7/5 as fast as Brianna, how fast does Katie run?
Brianna is 2/3 as fast as Eugene 2/3 * 4 m/h
Katie is 7/5 as fast as Brianna 7/5 * 2/3*4 = ...... m/h
thanks a lot