Answer:
the answer is C.-1/128......
The percentage by which the cost is increasing will be 75%.
<h3>What is the percentage?</h3>
The quantity of anything is stated as though it were a fraction of a hundred. A fraction of 100 can be used to express the ratio.
The percentage of the 8th graders who want to go to the water slides is found from;
In the year 2000, a house was valued at $60 000.
In 2010, the same house was valued at $80 000.
The percentage value is found as;

Hence the percentage by which the cost is increasing will be 75%.
To learn more about percentages, refer to:
brainly.com/question/13450942
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The answer is 15.525. All you have to do is divide 279.45 by 18 which gives you 15.525.
18
First you want to change the 20% into a decimal which is .20
Next you want to multiply 90 by .20 because that will give you the answer for 20% of 90
90x.20=18
Hope that helps
Answer =yes, the residuals would tend to be one sided