Answer:

Step-by-step explanation:
we know that
The surface area of the cube is equal to the area of its six square faces
so

where
b is the length side of the cube
we have

substitute

Answer: i think the answer is A.
Step-by-step explanation:
Answer: A
Step-by-step explanation:
I just answered this question on edg
Answer:
B in the photo
Step-by-step explanation:
another way to write the problem:
square root is also taking the 1/2 power:

since they are raised to the same power:

Center at (h,k) and radius r is
(x-h)²+(y-k)²=r²
so given
center at (9,-8)
(x-9)²+(y-(-8))²=r²
(x-9)²+(y+8)²=r²
input the point (19,22) to find r²
x=19 and y=22
(19-9)²+(22+8)²=r²
10²+30²=r²
100+900=r²
1000=r²
10√10=r
well, the equation is
(x-9)²+(y+8)²=1000