CoolRahim9090
29.01.2020 •
Mathematics
The volume v of a cylindrical can is represented by the formula v=pir2 a cilindrical can has a volume of 1089 pi cubic centimeters and a height of 9 centimeters what is the radius of the can?
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Ответ:
r = (11√π)/π
Step-by-step explanation:
V = πr²h
We are given V = 1089, and h = 9. Plug them into the formula and simplify
1089 = πr²(9)
121 = πr² (divide by 9 on both sides)
121/π = r² (divide by π on both sides)
√(121/π) = r (take the square root of both sides)
Now simplify √(121/π)
(√121)/(√π)
11/√π
[11(√π)]/[(√π)(√π)]
(11√π)/π
so r = (11√π)/π
Ответ:
1. aluminum chloride
2. 3
3. 9
Explanation:
1. Know the names
2. reactants are on left side products are on right side