Find the range of 4 , 3 , 7 , 9 , 12. Single choice.

8

9

12​

9

Step-by-step explanation:

The range of a set of numbers is the difference between the greatest and the least number.

Greatest number: 12

Least number: 3

12 - 3 = 9

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.