Find the common ratio: 4, -16, 64, -256, ...​

you multiply by -4 each time.

Step-by-step explanation:

4 x -4= -16

-16 x -4 = 64

64 x -4 = -256

hope this helps

-4

Step-by-step explanation:

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b. x + 1

step-by-step explanation:

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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.