An in-ground swimming pool has a length that is three times as long as it is wide, and it has a border around it that measures 200 feet total. how wide is the swimming pool in feet?
the perimeter (p) of a rectangle is p=length+length+width+width.

  25 feet

Step-by-step explanation:

Let w represent the width. Then the length is 3w and the perimeter is ...

  P = 200 ft = length + length + width + width

  200 ft = 3w +3w +w +w

  200 ft = 8w . . . . . . . . . . . . . simplify; next, divide by 8

  200 ft/8 = w = 25 ft

The width of the swimming pool is 25 feet.

Width of pool is 25 feet

Step-by-step explanation:

Let the width be x

Now we are given that length is three times as long as it is wide.

Length = 3x

Now we are given that it has a border around it that measures 200 feet total.

Perimeter of Swimming pool =

Perimeter of Swimming pool =

Perimeter of Swimming pool =

So, ATQ

Hence Width of swimming pool is 25 feet

the answer   is 200

step-by-step explanation:

this is a problem about poisson probabilities.   i don't know if you've

already studied poisson distributions, or if you have a place to look

to read more about the subject.  

here's how you can see a poisson distribution coming.   when there are

a lot of events that may happen at any time (or any place), and when

you're counting how many of them happen at a particular time (or a

particular place), and each event is independent of the others, then

the result is a poisson distribution.   this is roughly true for the

chocolate chips; one chip being in a cookie has only a small effect on

the probability that another chip will be in the cookie.

once you know you have a poisson distribution, you know a lot.   there

is only one parameter to a poisson distribution, so if you know the

mean, you know everything.   the form of the distribution is

  probability of n chips = {[e^(-x)]*(x^n)} / (n! )