Call wireless phone company charges $0.50 for the first call you make and $0.10 for each additional minute. the cost of a phone call can be expressed by the formula c = 0.50 + 0.10(m – 1), where c is the total cost in dollars and m is the number of minutes that you talk. if the bill for your phone call was $1.90, how long did you talk? a. 12 minutes b. 14 minutes c. 15 minutes d. 16 minutes

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.