The US spends on average 10,200 dollars on each student per year. There are about 77,000,000 students in the United States. How
1 answer:
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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