Answer:
The surface area of the gift box that Kira decorates is 
Step-by-step explanation:
see the attached figure to better understand the problem
we know that
A cube has six square faces
The surface area of a cube is equal to the area of the six squares faces

where
b is the length side of a cube
In this problem we have

substitute


Answer:
127/72
Step-by-step explanation:
7/8+8/9
63/72+64/72
127/72
Answer:
#2 is 512mm³
#3 is 120m³
Step-by-step explanation:
#2
8³ which # 8×8×8=512mm³
#3 v=bh
v=20×6
v=120m³
Answer:
52.0 m
Step-by-step explanation:
The triangle formed by the flagpole, the ground and the 30° line is a right triangle, with x as the required length to be found.
Using the tangent ratio
tan30° =
=
( multiply both sides by x )
x × tan30° = 30 ( divide both sides by tan30° )
x =
≈ 52.0 m
Cos A cos B + sin A sin B