Answer:
Cylinder
Step-by-step explanation:
A cylinder has a 2 flat surfaces.
1 on each side
Answer: Cylinder is the correct answer
Hope this helps.
Answer
Step-by-step explanation:
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The explicit formula for calculating the sum is

The sum of the nth term of a sequence is expressed as;

a is the first term
d is the common difference
n is the number of terms
For the sequence 0 + 1 + 2 + 3 +...

Similarly for the sequence:
1 + 2+ 3 + 4+...

Taking the product of the sum to get the explicit formula for calculating the sum

Learn more here: brainly.com/question/24547297
3+5=8
8/20 =.4
.4 goes to 40% bc you move the decimal over twice