1st one Explains Wht it is and y.
To find the area of a semicircle you would use the formula A=pie * r ^ 2 If you fill in 40 for r you would get 5026.5482
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sorry in dont know the ans
3x + 8(2) = 19, 3x + 16= 19 , 3x=3 , x =1
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Which Question???
Step-by-step explanation: