Kareen has 2.56 pieces of led for her lead pencil. It fills up the entire pencil. How many pieces of led would she need for 20 pencils?(No caculators I will know if you use one and this requires a explanation)

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! )

c.35

step-by-step explanation:

8+13=21

21+8=29

29+6=35

4.

step-by-step explanation:

it have the same area.brainliest

the answer is 1/4

step-by-step explanation: