35 words to 112 words. Percent change?????
1 answer:
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Answer:
- 15 m
Step-by-step explanation:
- x² + 20² = 25²
- x² + 400 = 625
- x² = 225
- x = √225
- x = 15
Answer: 879.20 km²
<u>Step-by-step explanation:</u>
The diameter of the big circle is 2(10) + 18 = 38
divide the diameter by 2 to get the radius (r) = 19
Area (A) = π·r²
= π(19)²
= 361π
The diameter of the small circle is 18
divide the diameter by 2 to get the radius (r) = 9
Area (A) = π·r²
= π(9)²
= 81π
The area of the shaded region is the difference between the big circle and the small circle.
= 361π - 81π
= 280π
= 280(3.14)
= 879.20