It takes David 30 minutes to walk to the car park and 60 to drive to work. At what time should he get out of the house in order to get to work at 9:00 a.m.?	Choose the correct choice
A) 7:30 a.m  B) 5:50 a.m  C) 7:50 a.m  D) 6:50 a.m  E) 9:50 a.m
The time it takes David to get to work: time to walk to car park + time to drive     30 + 60= 
<gadget id="calculator">  30 + 60</gadget>
<output>90</output>
90 minutes= 1 hour and 30 minutes   David needs to get out of the house 1 hour and 30 minutes before 9:00 am at   9:00 - 1:30 = 7:30 a.m   correct answer 7:30 a.m
<result>A</result>
It takes David 30 minutes to walk to the car park and 60 to drive to work. At what time should he get out of the house in order to get to work at 9:00 a.m.?