Answer:
 $1529.8
Step-by-step explanation:
Given:
Tammy has a job that has a weekly salary of $1,200.
But wants to switch a job that has a monthly salary of $11,700
Question asked:
How much more will she make per week if she switch to the new job?
Solution:
Monthly salary of a new job, she wants to switch = $11,700
Weekly salary  of a new job, she wants to switch = ?
 As we know : 1 month = 4.286 Weeks
 Salary of 1 month for a new job, she wants to switch = $11,700
 Salary of  4.286 Weeks  for a new job, she wants to switch =  $11,700
 Salary of 1 Week  for a new job, she wants to switch = 
Now, we have to find that How much more she will make per week,  if she switch to the new job.
More money she will make for a new job she wants o switch = Weekly salary for a new job, she wants to switch  - Weekly salary of current job 
More money she will make, for a new job = $2729.8 - $1200 = $1529.8
Therefore, she will  make $1529.8 more  per week if she switch to the new job.