A student needs to make a circular cardboard piece with an area between 154 square inches and 616 square inches. The function f(r) relates the area of the cardboard piece, in square inches, to the radius r in inches. Which of the following shows a reasonable domain for f(r)?

Question

sparklestaraa · Answer

@DanJS

sparklestaraa · Answer

B ?

sparklestaraa · Answer

@pooja195

danjs · Answer

$$154 \le \pi *r^2 \le 616$$

the domain of the function f(r), is all the values for r

danjs · Answer

you need to solve that inequality for r

danjs · Answer

sorry, it says between, it is just 
154 < pi*r^2 < 616

not equal to also