There are 13 teams of cheerleaders at a competition. the order of performance is determined at random. what is the probability that your team performs first and your friend's tema is second?

probability of you performing first is 1/13

after your team performs there are 12 teams left, so chance of the other team performing next is 1/12

chance of both happening = 1/13 * 1/12 = 1/156

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80

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.