Given the linear relationship modeled in the table, how much would 5 sandwiches cost ?

sandwiches 1 | 2 | 3 | 4
cost 2.05| 4.10 | 6.15| 8.20

Jackson earns $25 per hour as a tutor at the college library. he set a weekly spending budget of $130 each week and puts the remaining money in his savings account. how many hours must he work this week to have at least an extra $50 to put in his savings account