The polynomial s^3-70s^2+1500s-10,800 models the profit a company makes on selling an item at a price s. a second item sold at the same price brings in a profit of s^3-30s^2+450s-5000. write a polynomial that expresses the total profit from the sale of both items.

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.