What is the surface area of the rectangular pyramid below?
(image)

a. 386.9 ft2
b. 593.8 ft2
c. 639.4 ft2
d. 1,053.2 ft2

The correct option is B.

Step-by-step explanation:

The area of pyramid is the sum of area of rectangular base and 4 triangular sides. Two triangle have base 18 ft and height 14.1 ft. Other two have base 10 ft and height 16 ft.

The area of rectangle is

Length of the base is 18ft and width is 10ft.

The area of a triangle is

The area of triangle with base 18 ft and height 14.1 ft is

The area of triangle with base 10 ft and height 16 ft is

The total surface area of the rectangular pyramid is

The surface area of the rectangular pyramid is 593.8 ft². Therefore the correct option is B.

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! )