Answer:
you did not supply enough information
Average rate is given by,

for section A, a=1, b=3
hope this helps.
Answer:
$3.75
Step-by-step explanation:
$12.50-$8.75=$3.75
Hope this helps!
Im pretty sure it'll be 400
Because if you take 20min/3pag then you times it by 60min it would equal 400. Hope I helped