Answer:
A = 19.625 inches
Step-by-step explanation:
formula for a circle is A = Pie * radius squared. 2.5 times 2.5 is 6.25 now multiply that by 3.14 to get 19.625 inches.
-1/2 is the slope of the line!
To find the magnitude of a vector, take the components, square them, then add them, then take the square root. This is very similar to the Pythagorean Theorem.
For your particular problem, I’ve included a picture showing how that specific calculation is done. :)