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A = A big circle - A little circlr

= (πr²) - (πr²)

= (3,14 × 5²) - (3,14 × 3²)

= 78,5 - 28,6

= 50,24 cm²

So, the area of shaded region is 50,24 cm²

Hope it helps and is useful :)

the interior has a radius of 3 so 3*3*3.14=28.26

the whole thing has a radius of 5 so 5*5*3.14=78.5

then 78.5-28.26= give you a total of 50.24 as area of the outer circle

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.  

thus, the first answer choice, y = sec x, is the correct one