The amount of effort that you put into your courses increases the marginal 
cost of your education.
Marginal cost refers to the incremental cost which is accrued as a result of 
increase in goods and services. 
In this scenario, amount of effort put into courses entails more time and 
money spent from buying of books and other materials. This therefore 
depicts an increase in the incremental and marginal cost.
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Answer: C- Encoding
Explanation: Encoding in communication is the process whereby the sender utilizes oral symbols like words, signs, pictures, videos, and non-oral symbols like body language, hand signals, facial expressions for which the sender believes the individual on the receiving side or audience will comprehend without misinterpreting.
It is the way of turning or transforming ideas into communication by using a channel that could be texts, phone calls or even in-person conferences. In this case, the marketing department decides to encode an ad campaign to the market so as to promote the new drug for lowering cholesterol. 
 
        
             
        
        
        
Answer:
The answer is:  $18, 750
Explanation:
The double-declining-balance(DDB) method entails computing depreciation of an asset at an accelerated rate. This method is employed when the asset loses value quickly and is expected to generate more revenue at the earlier stages of its useful life. The depreciation is higher at the beginning and lower close to the end of the asset's useful life. The depreciation is computed as follows:
Depreciation = 2 * straight line depreciation percentage * Book value at the beginning of the period
Machine cost: $75, 000
Residual Value: $5, 000
Estimated Life: 4 years/18, 000 hours
Straight line depreciation percentage : 100/4 = 25% 
Depreciation Year 1 on DDB =  2 * 25% * $75, 000
                                                = $37, 500
Depreciation Year 2 on DDB =  2 * 25% * ($75, 000 -$37, 500)
                                                = $18, 750
        
 
        
             
        
        
        
In the given situation, Amelia is wrong. Anyone who is fully aware and  supported any criminal acts is considered a violator of the law. All people who participated in a criminal act is guilty of the crime. 
However, it will only be punishable if there are witnesses and evidence.