Jennifer left her house at 6: 45 a. m. it took her 8 minutes 45 seconds to walk to the bus stop. she waited 3 1/4 minutes for the bus and then rode the bus 7 1/2 minutes to her school. at what time did she arrive at school?

1 minute = 60 seconds.

1/4 of a minute = 15 seconds.

She waited 3 minutes 15 seconds for the bus.

1/2 minute = 30 seconds

She rode the bus for 7 minutes 30 seconds.

Her total time was:

8 minutes 45 seconds + 3 minutes 15 seconds + 7 minutes 30 seconds =

19 minutes and 30 seconds.

Add 19 minutes and 30 seconds to 6: 45 am,

6:45 + 19 minutes 30 seconds = 7:04:30 am

ratio is 2 : 9

the answer is three

13.5 : 3