Answer :
There is 6 hours between 9am and 3pm
360 minutes in 6 hours
360 / 45 = 8
63 x 8 = 504
Marcus can meet the deadline, if he is able to bake 63 every 45 minutes then he will have baked 504 by the deadline.
360 minutes in 6 hours
360 / 45 = 8
63 x 8 = 504
Marcus can meet the deadline, if he is able to bake 63 every 45 minutes then he will have baked 504 by the deadline.