Respuesta :

xXcOINXx1

Answer:

78, 44.625, 384, 42.5

Step-by-step explanation:

1) 90-12= 78

2) 25+19.625(3.14 x 2.5(the radius)squared)= 44.625

3) 320+64= 384

4) 30+(1/2(25))= 42.5

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