You walk one mile to school every day. You leave home at the same time each
day, walk at a steady speed of 3 miles per hour, and arrive just as school begins. Today you
were distracted by the pleasant weather and walked the first half mile at a speed of only 2
miles per hour. At how many miles per hour must you run the last half mile in order to arrive
just as school begins today? Choose the most appropriate option
A) 4  B) 6  C) 8  D) 10  E) 12
Recall the formula s = v *t, where in this case, s is distance (in miles) traveled at a   constant speed of v (miles per hour), for a time of t hours. The first statement indicates that   it usually takes you only 20 minutes to go to school (solve for t in 1 = 3 * t and change units)   Today, it took you 15 minutes to cover the first half mile (solve for t in 1=2 = 2 * t and   change units). You only have 5 more minutes to arrive (that is 1/12th of an hour), and need   to cover another half mile. Solve for v in the equation 1/2 = (1/12) *v.   correct answer 6
<result>B</result>
You walk one mile to school every day. You leave home at the same time each
day, walk at a steady speed of 3 miles per hour, and arrive just as school begins. Today you
were distracted by the pleasant weather and walked the first half mile at a speed of only 2
miles per hour. At how many miles per hour must you run the last half mile in order to arrive
just as school begins today?