Aphone line runs east along a field of 1.4 miles and then north along the edge of the same field for 2.5 miles. if the phone line cost 3500 per mile to install, how much could have been saved if the phone line had been installed diagonally across the field?

3621.41

Step-by-step explanation:

Given

Phone line runs along east for 1.4 miles

then 2.5 miles along north

It costs 3500 currency per mile

Total distance=1.4+2.5=3.9

For diagonal running

Thus currency saved =13,650-10,028.58=3621.41

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! )