Someone help me with this math problem please

:)

a. True

b. False

c. True

d. False

e. False

Step-by-step explanation:

a. 2.3 + ( -2.3) = 0

b. (-3.7) + (-4.1) = -7.8

c. -2.6 - (-12/4) = 0.4

d. 5/2 + (-2.5) = 0

e. 72 - (-100) = 172

I hope this helps

h who knows

step-by-step 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! )