The surface area of a sphere can be approximated as follows: Surface area = 4πr2; where r is the radius of the sphere; π is a constant that is roughly equal to 3. Calculate the surface area of a sphere with a radius of 7 meters using the simple approximation above.

588

Explanation:

From the illustration, the surface area is given by the formula:

Surface area = 4πr2, where r is radius and π is a constant with a value of 3.

Then, if for a sphere, r = 7 m, the surface area becomes:

Surface area = 4 x 3 x 7 x 7 = 588

The surface area of a sphere with a radius of 7 meters is therefore 588

[ answer ]

foliated

[ explanation ]

foliation forms in a rock when pressure squeezes the rock together. the rock then has a design of many different color little lines. there are three types of foliated rock. the types are slate, schist, and gneiss. each type of foliated rock is different based on grain size and foliation characteristics. the lines appear when the rock has been under pressure.

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the answer to your question is b