It is asking you to convert them to different units of measurements.
Answer:
Third option.
Step-by-step explanation:
You need to remember that the formula used to calculate the arc lenght is:
Where "r" is the radius and "C" is the central angle in radians.
You need to solve for "C":
You know the radius and the arc lenght, therefore, you can substitute values to calculate the central angle in radians. Therefore, this is:
Answer:
18
Step-by-step explanation:
90% of 20 is 18
hope it can help you,x=-5,x=2
calculation is given in the picture