Well, 9/10 is the same as 9 10ths, the decimal that represents that is 0.9 because it is also 9 10ths
Answer:
1 2/21
Step-by-step explanation:
2/3 + 3/7
14/21+ 9/21= 23/21
The third one duhhh, Ik this stuff
Answer: Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. A cuboid has 6 rectangular faces. To find the surface area of a cuboid, add the areas of all 6 faces. We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.
Step-by-step explanation:
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