Question

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.

Answer 1

its basicaly just 5 :)

Step-by-step explanation: i took the test

Answer 2

If the area of the circle is 78.5 squared inches (note we use squared inches for areas and cubic inches for volume) and we want to know its radius
`r`, we have to use the formula of the area of the circle:

`A_(circle)=\pi r^(2)`

Then isolate
`r`:

`r^(2)=(A_(circle))/(\pi)`

Applying square root on both sides:

`\sqrt{r^(2)}=\sqrt{(A_(circle))/(\pi)}`

`r=\sqrt{(A_(circle))/(\pi)}`

Substituting the known values:

`r=\sqrt{(78.5 inch^(2))/(3.14)}`

`r=5`>>>>>This is the radius