18% of what number is 43?
Answers
The required number is 238.88 and 18% of it would be 43.
What is the percentage?
The percentage is defined as a ratio expressed as a fraction of 100.
The % formula is used to calculate a percentage of a whole in terms of 100. Calculating percentages indicated above can be readily computed using the formula below:
Percentage = (Value/Total Value) × 100
Let's the unknown number would be x.
According to the given question, we have to determine the evaluation of 18% of x = 43.
⇒ 18% of x = 43
18% is expressed as 18/100 in fractional form
⇒ (18/100)x = 43
18/100 is expressed as 0.18 in decimal form
⇒ (0.18)x = 43
⇒ x = 43/(0.18)
Apply the division operation, and we get
⇒ 238.88
Therefore, 18% of 238.88 would be 43.
Learn more about the percentages here:
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1. We assume, that the number 43 is 100% - because it's the output value of the task. Also that x is the value that we are looking for.
So you write down 100%=43
Next x% equals 18 of the output value.
so you write it down as x%=18
Now we have two simple equations:
Which is 100%=43 and x%=18
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
100%/x%=43/18
Now we just have to solve the simple equation.
Solution for 18 is what percent of 43?
(100/x)*x=(43/18)*x - we multiply both sides of the equation by x
100=2.38888888889*x - we divide both sides of the equation by (2.38888888889) to get x
100/2.38888888889=x
41.86=x
x=41.86
now we have:
18 is 41.86% of 43
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Answers
Answers
Answer:
The enthalpy change per mole of sodium when sodium reacts with water is 28.36 kJ
Step-by-step explanation:
The given parameters are;
Mass of sodium = 8 grams = 0.008 kg
Volume of water = 227 cm³ = 0.000227 m³
Initial water temperature, T₁ = 298 K
Final water temperature, T₂ = 308.4 K
Specific heat capacity of water = 4.18 J/(K·g)
Density of water = 1000 kg/m³
Mass of water = 1000×0.000227 = 0.227 kg = 227 g
Heat change, ΔH = m×c×ΔT = m×c×(T₂ - T₁)
ΔH = 227*4.18*(308.4 - 298) = 9868.144 J = 9.868 kJ
Molar mass of sodium = 22.989769 g/mol
Therefore, 8 grams contains;
8/22.989769 = 0.348 moles of Na
Which gives the enthalpy change per 0.348 moles of Na when sodium reacts with water = 9.868 kJ
Therefore, when one mole of Na reacts with water we have;
The enthalpy change per 0.348/0.348 = 1 mole of Na when sodium reacts with water = 9.868 kJ/0.348 = 28,358.3 J = 28.36 kJ.
Answers
Answer:
The percentage of the students that buy tickets are 33.02%
Step-by-step explanation:
The percentage of students that buy tickets is calculated as:
Where X is the number of students who buy the tickets and Y is the number of students that are enrolled in the school. Replacing X by 604 and Y by 1829, we get:
Percentage=33.02%
Then, the percentage of the students that buy tickets is 33.02%
The formula is number of students who bought the tickets
.......................--------------------------------------------------------
.......................number of students enrolled
A. B. C. D. What is the solution to the proportion?
A. B. C. D. A cornbread recipe calls for 2 eggs to make 15 servings. How many eggs are needed to make 45 servings? A. 30 eggs B. 15 eggs C. 8 eggs D. 6 eggs . I don't understand these question can someone help me? plz and thank you
Answers
Hope it helps
10(55-1000)/90+2=?
Answers
• Now , we have:
• 10x (-945) : 90 + 2 =
= -9450: 90 + 2 =
= - 105 +2
= - 103 .