Answer: 5 places
Explanation: 9-4=5
To figure out the percentage you got correct, we need to set up fractional proportions.
We already have one fraction, 14/20.
Since we are looking for a percentage, we need to have a maximum total percentage that represents the total score.
100% is the maximum percentage for any total.
So we have our fractional proportions set;
14/20 : x/100
To solve for this, we need to cross multiply the numerator (top number) of one fraction by the denominator (bottom number) of the other fraction.
Let's try this!
14 • 100 = 1400
20 • x = 20x
Now that we have our products, set them as an equation.
20x = 1400.
To solve for x, we need to divide both sides by 20.
20x / 20 = x
1400 / 20 = 70.
You are left with:
x = 70.
Your answer is:
If you get 14/20 on a test, you would get 70% of the questions correct.
I hope this helps!
1. (7/21) = 0.33
2. (6/21) - (3/21) = (3/21)
= 0.14
The marginal demand to estimate the change in demand when the price is increased by one dollar is -157.
Given, where p represents the price of the item in dollars.
Currently, the price of the item is $20.
<h3>What is marginal demand?</h3>
In economics, marginal demand refers to the shift in demand for a product or service in reaction to a price adjustment. Normally, as the price of a good or service rises, demand decreases, and vice versa, as the price of a good or service decreases, demand increases.
We have to use the marginal demand to estimate the change in demand when the price is increased by one dollar.
The rate of change of demand with respect to price is obtained by differentiating D with respect to p in .
That is, dD/dp = -8p+3
Given, p = $20
dD/dp = -8×20+3=-157
Therefore, the marginal demand to estimate the change in demand when the price is increased by one dollar is -157.
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Answer: can’t really see it
Step-by-step explanation: