The surface area of a cube is:
A=6s^2 (It is just the area of 6 sides (squares) all having an area of s^2)
A=7.2^3=373.248 ft^3
54 divided by 5 is 10.8 which is her height multiply by 2 because it twice her height which is 21.6 the do 54-21.6 which gives you an answer of 32.4
(5x²+4)–(5+5x³)
25x+4–5+125x
150x–1
|AC| = 2|DE|
⇒
4x - 2 = 2(x + 6) = 2x + 12
2x = 14
x = 7
⇒
|AC| = 26
Answer: b is the answer
Step-by-step explanation: