Given that,
The diameter of a semicircle is 2 mm.
To find,
The area of the semicircle.
Solution,
Radius of semicircle, r = 1 mm
The area of a semicircle is given by the formula as follow :
![A=\dfrac{\pi r^2}{2}\\\\=\dfrac{3.14\times (1)}{2}\\\\=1.57\ \text{mm}^2](https://tex.z-dn.net/?f=A%3D%5Cdfrac%7B%5Cpi%20r%5E2%7D%7B2%7D%5C%5C%5C%5C%3D%5Cdfrac%7B3.14%5Ctimes%20%281%29%7D%7B2%7D%5C%5C%5C%5C%3D1.57%5C%20%5Ctext%7Bmm%7D%5E2)
So, the area of the semicircle is
.
Possible outcomes: 5040
Possible to begin with a 0: 504
Theoretical probability: 0.1
These are the correct answers
111 hours is the answer. Hope is help.
2) If we have 2 points K & M with their coordinates (x₁,y₁) & (x₂,y₂), the the distance of KM is given by the formula:
KM = √[(x₂-x₁)² + (y₂-y1)²] ; K(2,3) & M(5,1) (Given)
KM = √[(5-2)² + (1-3)²] ==>√(9+ 4) ==> KM = √13 (ANSWER D)
3) The coordinates are A(4,7) & B(-3,9). Follow & apply the same methodology as above:
AB =√[(x₂-x₁)² + (y₂-y1)²] ; A(4,7) & B(-3,9) (Given)
AB =√[(-3-4)² + (9-7)²] ==> AB = √[(-7)² + (2)²] ==> √(49+4) =√53 (B)
;
I think it is -160 I’m not sure tho