100 points
hlp
nikki makes $9.50 an hour working at current electronics. she plans to buy a dvd recorder that costs $269.60. write and solve an inequality describing how many hours h nikki will have to work to be able to buy the dvd recorder.
1. 9.50h ≥ 269.60; 29 hours
2. 269.60 + h ≥ 9.50; 31 hours
3. 269.60h ≥ 9.50; 30 hours
4. 269.60 – h ≥ 9.50; 28 hours

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.