The air you breathe is 1/5 oxygen. What percent of the air is made up of other gases?

80%

Step-by-step explanation:

1/5 is about 20%, so the remaining 4/5 is the remaining 80% of the air

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

answer: i think one of the answer is $150 and $300?

step-by-step explanation: