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can you please help me on problem 4 and 5 of my teacher created problem.

Can You Please Help Me On Problem 4 And 5 Of My Teacher Created Problem class=

Sagot :

4. Area of a disk of diameter D : [tex]A= \pi*(D/2)^2\approx3.14*(3.5)^2=38.465[/tex]

Assuming that you use the usual convention of rouding 5 to the greater number : 

A=38.47

5. Diameter of a circle of radius r : [tex]A= \pi D=47[/tex] hence [tex]D\approx47/3.14\approx14.97[/tex]