graphing a piecewise-defined function
which graph represents the piecewise-defined function f(x) =

Last option

Step-by-step explanation:

Note that when the point is not included in the function is marked with an empty circle, and when the point is included in the function is marked with a filled circle.

From the interval f(x) is represented by the slanted line that cuts the y-axis at

The starting point of the line must be filled and the end point must be empty.

Then, from the interval f(x) is defined by the horizontal line . The starting point of this line is marked with a filled circle because it includes the point

Therefore the correct option is option D or the last graph (from left to right)

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 is 33

step-by-step explanation: