If Alan knows one already, there is 3 more left for him to possibly know
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
#SPJ1
You would turn the 15% into a decimal which is .15 then multiply .15 by 4.25. After multiplying those together add 4.25 to the answer.
Answer:
Commutative Property of Multiplication, I believe. Hope this helps!
Step-by-step explanation:
The polynomial is the expansion of (x-3)(x-1)(x+4)²