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


So than given that the diameter of a circle is 28 inches so from this result the radius is d/2 = 28/2 = 14 inches
than the circumference of circle will be equal 2*3,14*14 = 6,28 *14 = 87,92 so rounded equal 88 in.
so this mean that choice c.) is right sure
hope this will help you
Answer:
About 71% of Earth's surface is covered in water.
Step-by-step explanation:
About 97% of Earth's water is salt water.
About 3% of Earth's water is fresh water.
<h2>
Answer:</h2>
27 km²
<h2>
Step-by-step explanation:</h2>












<em>I hope this helps you</em>
<em>:)</em>
Tried a whole bunch of odd sequences:
11 + 13 + 15 = 39
Nope too small.
21 + 23 + 25 = 69
Woah too big!
And after a few more trials found that:
17 + 19 + 21 = 51
Woohoo!