radius is the distance from the centre of a circle to any given point on its circumference, diameter is the length between two points that are the furthest possible from each other on the circle's circumference.

The diameter is twice the radius.

Therefore, if the radius is 12in then the diameter is 24in.

3 0

4 years ago

A farmer has 1800 feet of fence and wants to enclose a rectangular field with two internal fences parallel to one side. What are

andrew-mc [135]

So.. if you notice the picture below.. .the length is that much

thus $\bf A=lw\qquad \cfrac{1800-3w}{2}=l\implies 900-\cfrac{3w}{2}=l
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A=\left( 900-\cfrac{3w}{2} \right)w\implies A=900w-\cfrac{3w^2}{2}\implies A=900w-\cfrac{3}{2}w^2$

take the derivative of A, zero it out, and then check the critica points for any maxima by using the first-derivative test

8 0

4 years ago

Find the expression as the cosine of an angle<br>cos pi/4 cos pi/9 - sin pi/4 sin pi/9

Vlad1618 [11]

Answer: cos(13pi/36)

Step-by-step explanation: just did the assignment

4 0

3 years ago