You bought some items on Amazon. Each item cost $13.49 and you paid a shipping fee of $15. You also paid 6.38% tax before adding the shipping fee.

a. she will receive a refund of $278.

step-by-step explanation:

the answer is 24

step-by-step explanation:

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.