Answer:
If Chelsea takes the bus then it will take 24 minutes longer to reach the work. And since Chelsea works 5 days a week total extra minutes that will be spent while riding bus to work will be equal to
= 24 * 5
= 120 minutes
And 120 minutes is equivalent to = 120/60 = 2 hours.
So in terms of money, taking the wage rate of $7 total money that will be spent not working while taking the bus will be equal to
= Wage rate * Hours spent not working while taking the bus
= $7 * 2
= $14
So, total amount spent not working while taking the bus to work is equal to $14 per week.
And there is also a direct cost for taking the bus is equal to $30 per week.
So total cost associated by taking the bus = Cost of not working while taking the bus + Direct cost for taking the bus
= $14 + $30
= $44
So, total cost associated with taking the bus is equal to $44 per week while the cost for driving car to work is equal to $70 per week.
So, as you can see taking bus to work cost $44 week while taking car to work $70. Now we can clearly see that taking bus to work cost ($70 - $44) = $26.
So, Chelsea must take the bus to work since the cost of taking bus $26 less than the cost of taking car to work.