What whole number best approximates the value of x?

Step-by-step explanation:

we know that

Observing the graph

The number lie on the interval----> (9.3,9.4)

so

Square root of x is greater than 9.3 and is less than 9.4

Round square root of x to the nearest whole number

----> because square root of x is less than 9.5

squared both sides

(a) the volume of the cone is 20/3 in3

hence, option a is correct.