What is the circumference of a circle, in centimeters? Use 22/7 for x

what is the rest of the question? ?

a.for lorena 14 hours makes $126   for 16 hours she makes 144

for julie 6 hours makes $72 for 21 hours its $252

b. julie makes more money than lorena julie makes $12 an hour and lorena makes $9  

.

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.