The surface "s" area of a sphere of radius " r" is given by the formula of s= 4πr^2 find;
1, the surface area of a sphere whose radius is 5 cm
2,the radius of a sphere whose surface area is 23716/81

As below

Step-by-step explanation:

1)    4*pi*= 314.159

2)    s = 4 * pi *

=r

= r

15.1643... = r   :)

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24

a

step-by-step explanation: