3•-13/8 is -4.875 or or -4 7/8
Answer:
36.75
Step-by-step explanation:
First is turn the percent into a decimal which would be 0.35.
Then multiply 0.35 with 105
Finally this would equal to 36.75
Note: Hope I got it right, if I didn't I am very sorry this is all I can really do. If I did get it wrong please comment and I'll try again.
2.1+18.9
The answer is going to be 21 because 9+1=10, you then carry the 1 for 8 so it’s going to be 9+2 which equals to 11 now you carry the 1 to the 1 so it’ll be 2. Therefore it’s 21.0 or just cancel out the 0 and just leave it as 21.
The surface area of a rectangular prism needs an formula.
For a rectangular prism you have to understand some about the shape.
It is a 3D shape consisting of 6 sides
all are rectangles
to determine the area of one rectangle is the base multiplied by the height or in this case length times with.
but you also need to account for all sides and the height.
so the Surface area formula would be like
![sa = l \times w + l \times h + w \times h](https://tex.z-dn.net/?f=sa%20%3D%20l%20%5Ctimes%20w%20%2B%20l%20%5Ctimes%20h%20%2B%20w%20%5Ctimes%20h)
this accounts for 3 of the sides of the rectangular prism.
the top,bottom,and side.
so to get the surface area of a rectangle prism you must mutiply each side by 2 to account for all sides of the rectangular prism.
so the surface area formula for a rectangular prism is
![SA = 2\\ \times l \times w +2 \times l \times h+2 \times h \times w](https://tex.z-dn.net/?f=SA%20%3D%202%5C%5C%20%20%5Ctimes%20l%20%5Ctimes%20w%20%2B2%20%5Ctimes%20l%20%5Ctimes%20h%2B2%20%5Ctimes%20h%20%5Ctimes%20w)
I won't solve it for you but just plug in your values for l,w,and h into that formula and you will get your answer in metres squared or m