What is the degree of the polynomial

The degree is the biggest exponent

6x^2 =2

7x^3 = 3

8x^5 = 5

9 = 0

So the biggest exponent of the given is 5 so:

The degree is 5

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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.