Abank records deposits as positive number and withdrawal as negative number. mike withdrew $60 from his bank account 3 times. what is the change in mike’s account balance after all 3 withdrawals

-180

Step-by-step explanation:

et's think about what Mike's actions mean mathematically.

ActionMath

Mike withdrew \$60$60dollar sign, 60-60−60minus, 60

333 times\times \:3×3times, 3

Hint #22 / 3

We can use the equation -60 \cdot 3=\:?−60⋅3=?minus, 60, dot, 3, equals, question mark to find the change in Mike's account balance.

Hint #33 / 3

The change in Mike's account balance after all 333 withdrawals is -\$180−$180minus, dollar sign, 180.

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! )

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour