fredbear373
fredbear373 fredbear373
  • 23-01-2019
  • Mathematics
contestada

What is the radius of a circle with an area of 78.5 cubic inches? Use 3.14 for pi. Enter your answer in the box.

Respuesta :

carlosego
carlosego carlosego
  • 02-02-2019

Answer: 5 inches.


Step-by-step explanation:

1. You must use the formula for calculate the area of a circle, which is shown below:

[tex]A=3.14r^{2}[/tex]

2. You know the area of the circle, therefore, you can solve for the radius, as following:

[tex]3.14r^{2}=A\\r^{2}=\frac{A}{3.14}\\r=\sqrt{\frac{A}{3.14}}[/tex]

3. Now, you must substitute the value of the area into the equation above. Then, you obtain the following result:

[tex]r=\sqrt{\frac{78.5in^{2}}{3.14}}\\r=5in[/tex]


Answer Link
lexichips
lexichips lexichips
  • 07-02-2019

Answer:

5 in

Step-by-step explanation:


Answer Link

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