marreromariamep3y9ho
marreromariamep3y9ho marreromariamep3y9ho
  • 15-04-2019
  • Mathematics
contestada

A circle is graphed with its center on the origin.The area of the circle is 49 square units.What are the coordinates of the x-intercepts of the graph? Round to the nearest tenth

Respuesta :

jamesphantos11
jamesphantos11 jamesphantos11
  • 15-04-2019

Answer:

3.95 and -3.95

Step-by-step explanation:

To graph a circle you can use the formula or (x – h)^2 + (y – k)^2 = r^2. So substituting in the given, we get x^2+y^2=49/pi. The x intercept is when y=0. So x^2=49/pi and so

x = sqrt(49/pi) and rounding to the nearest tenth, we get 3.95 and -3.95 because it isn’t a principal square root.

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