A circle has an area of 3.14 cm^2 . What is its radius?

1cm
2cm
1/2cm
cant be detemined

The radius of the circle is 1 cm, if the circle has an area of 3.14 .

Step-by-step explanation:

         The given is,

                  Area of the circle is 3.14 ,

Step:1

        The formula for Area of circle,

                    A = π....................(1)

       where,

                   π - 3.14

                    r -  Radius of circle

Step:2

         From the given,

               Area, A = 3.14

        Eqn (1) becomes,

                  3.14 = 3.14 ×                (∵ π = 3.14 )

                      =

                      = 1

                    r =

                      = 1

                    r = 1 cm

           Radius of circle, r = 1 cm

Result:

      Thus the radius of the circle is 1 cm, if the area of circle is 3.14 .

b. astronomers

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,