The surface area of a sphere can be approximated as follows: Surface area 4pi r^2;
where r is the radius of the sphere
pi is a constant that is roughly equal to 3.

Using the simple approximation above, calculate the surface area if a sphere with a radius of 2 meters.

A.) 24 meters squared

B.) 9 meters squared

C.) 16 meters squared

D.) 48 meters squared

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

some of your causes might be acidic rain or natural wildfires that cause the parks to be degraded

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