Given:
and .
To find:
The combinations without repetition are possible if and .
Solution:
Combination of selecting r item from total n items is:
We have and . By using the above formula, we get
Therefore, the correct option is D.
Answer:
Sandy needs of carpet to build a scratching post for her cats
Step-by-step explanation:
Sandy needs to calculate the surface area of the cylinder
The surface area of the cylinder is equal to
we have
----> the radius is half the diameter
assume
substitute the values
Sandy needs of carpet to build a scratching post for her cats
4>-3
-2>-5
1=1
They want to make sure you understand inequalities and know how to use the inequality signs.