Sports companies cover the surface of a soccer ball with waterproof spray to prevent it from getting water logged. The radius of a soccer ball is 11cm. The formula to calculate Surface Area of a ball is SA = 4πr2 S A = 4 π r 2 . How much surface do they need to cover with the spray?

Step-by-step explanation:

The expression for the total surface area is

SA=4πr^2

given that r=11cm

we want to substitute the value of r to solve for the area

SA=4πr^2

SA=4*3.142*(11)^2

SA=2.568*11^2

SA=2.568*121

SA=310.728

Therefore they need to cover a surface of 310.73cm^2

b

step-by-step explanation:

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not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this