Answer:
Answer in file:
Step-by-step explanation:
Answer:
Step-by-step explanation:





x ≈ 4.66667
Answer: 1.8x
Step-by-step explanation:
Answer:
The arc length of the semicircle is
or 
Step-by-step explanation:
The complete question in the attached figure
we know that
The circumference of a semicircle is given by the formula

where
D is the diameter of the semicircle
we have

substitute

----> exact value
Assume

----> approximate value
therefore
The arc length of the semicircle is
or 
8.1* 10^13 just the product or do you need it in scientific notation?