Find the area of this sector and composite shape. Write your answer as an exact value and as a decimal, correct to two decimal places. Please someone answer

A= 20,58m²

Step-by-step explanation:

the side opposite to what is worth 6m is the diameter of the half circle to the left. I calculate the circumference of the circle (diameter multiplied by π), so 6 × π = 18.84

since the circumference is not whole but only half, we divide the result in half: 9.42 (the length of the half circle).

formula for the area of the rectangle: base multiplied by the height all divided by 2: (10×6)/2= 30m²

we subtract half the circumference: 30-9,42=20,58m²

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.