Answer:
20 feet long
Step-by-step explanation:
To solve this you need to use the Pythagorean theorum,
, where c is the length of rope needed and A and B are the side lengths. Think of it like a right triangle.
So, the equation is

Which is then


And the possible values of c are 20 and -20.
From here we know the answer cannot be -20 because you cannot have a negatively long length of rope, so the answer must be 20 feet.
The perimeter is 320. Just multiply 80 times 4
Answer:
1/4
Step-by-step explanation:

Answer:
the answer is x=6
Step-by-step explanation:
Answer:
the expression is: 
and 2730 different ways are possible.
Step-by-step explanation:
In the given question we have to choose a president, vice
president, and secretary.
Permutations are used when order is important so, as in the given question order is required. We would use permutations
The formula used is:
where:
n=total number of objects
r=number of objects selected
In our case: n=15, r=3
Putting values and finding the answer:

So, the expression is: 
and 2730 different ways are possible.