B) What is the probability that a randomly chosen child has a height of more than 54.7 inches?

Radius: 3.5 units.

the circumference is the length of one entire rotation of the circle.

its formula is

   

using r = 3.5, we have

   

so the distance you need to walk to go once around the circle is 7π units.
to go around 26 times, you have to go a distance of
7π  × 26 = 182π units.



we have distance of 182π  units and speed of 14π units/hr.

rearranging this formula:

   

substituting 182π  units for distance and 14π units for speed:

   

it would take the bug 13 hours.