The cost in Z dollars to operate a chainsaw is related to the number of minutes x the saw is run by the function z(x) = 2 2x2 - 66x+655. For what number of minutes is the cost of running the machine a
minimum?

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.

answer: you need to organize this better it does not make sense.

step-by-step explanation: ?