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Answer:
8448.22
Explanation:
We are asked to calculate the present value of 20,000 in ten years.


<em>Resuming: </em>in this kind of problems we are asked for which lump sum becomes a certain amount in a given period of time at an annual rate
In most cases, the supply curve is drawn as a slope rising upward from left to right, since product price and quantity supplied are directly related (i.e., as the price of a commodity increases in the market, the amount supplied increases). ... A change in any of these conditions will cause a shift in the supply curve.
The price of the water needs to be raised by 40% when the consumption of water reduces by 10% and the price elasticity of demand results to 25%.
<h3>What is meant by the price of elasticity of demand?</h3>
The price elasticity of demand is determined as the proportionate variation in quantity with respect to variation in the price of a good.
Given values:
Change in water consumption (fall): 10%
Price elasticity of demand: 25%
Computation of percentage change in the price of water:

Therefore, there is an increase in water price by 40%.
Learn more about the price elasticity of demand here:
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Answer: C. use 0.8 fewer units of capital.
Explanation:
The Marginal Rate of Technical Substitution (MRTS) shows how much you can decrease capital or labor by in order to keep production constant if you increase either capital or labor.
It is calculated by the formula:
= Marginal product of labor / Marginal product of capital
= 4 / 5
= 0.8
<em>The firm should use 0.8 fewer units of capital in order to maintain the same production level. </em>