A home cleaning service takes more time to clean larger spaces. The table shows the number of minutes it takes for the service t
1 answer:
The time required to clean 200 square feet will be 80 minutes. Option B is correct.
<h3>What is the surface area?</h3>The total land area of all the faces of a three-dimensional object is its surface area. When we wish to wrap something in real life, we employ the notion of surface areas of distinct things.
Let x be the cleaning time for the 200 square feet area;
From the table, it is observed that for a 1 sq. foot area the time needed to clean will be 0.4 minutes.
1 square feet = 0.4 minute
200 square feet = 200 × 0.4
200 square feet = 80 minute
The time required to clean 200 square feet will be 80 minutes.
Hence, option B is correct.
The table is attached in the attachment.
To learn more about the surface area, refer to the link;
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Answer:
The value is
Step-by-step explanation:
From the question we are told that
The amount charge per year is
The number of members it will have at this amount is
The amount amount increase that will lead to the loss of a single member is
Generally the total amount the club would obtain from its members is mathematically represented as
Now let x denote the number of member lost
Hence
=>
=>
Thus the number of members that be removed to give the maximum income from dues is obtained by differentiating the above equation and equating it to zero
=>
So from we have
So the amount the club should charge is