Mathematics
18 Online
OpenStudy (anonymous):
Find the probability that a randomly chosen point lies in the shaded region.
Will attach picture(to the best of my ability)
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
hold on
OpenStudy (anonymous):
don't need the picture
it is the ratio of the shaded region to the total region
OpenStudy (anonymous):
If I give you measurements can you work me through that?
OpenStudy (anonymous):
find the area of the shaded region, find the area of the total region, take the ratio
OpenStudy (anonymous):
is the problem finding the two areas needed?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
Yes.
OpenStudy (anonymous):
ok well i pretty much suck at geometry, but i could try
OpenStudy (anonymous):
|dw:1456283828581:dw|
OpenStudy (anonymous):
Hard to type sorry
OpenStudy (anonymous):
The shaded region is the triangle at the bottom
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
lord
OpenStudy (anonymous):
ok we can find that area no problem
use pythagoras to find the missing side, then use one half base times height
OpenStudy (anonymous):
|dw:1456283996507:dw|
OpenStudy (anonymous):
let me know when you get x, hint, it is a whole number
OpenStudy (anonymous):
x = 15?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
so triangle is one half base times height, height is 15, base is 8 get ...
OpenStudy (anonymous):
60
OpenStudy (anonymous):
ok good
now for the next region ...
OpenStudy (anonymous):
What would be it's formula? I don't even know
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
break it up in to rectangle and triangle
OpenStudy (anonymous):
|dw:1456284266523:dw|
OpenStudy (anonymous):
area of rectangle is easy enough right?
OpenStudy (anonymous):
Yup, 12 * 8 = 96
OpenStudy (anonymous):
and so is the area of the triangle
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
did you get 20 yet?
OpenStudy (anonymous):
Yup
OpenStudy (anonymous):
so total area is \[20+96+60\] whatever that is
OpenStudy (anonymous):
176
OpenStudy (anonymous):
So I would take 60 and divide that by 176 for the %?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
ok i believe you
so \[\frac{60}{176}\]
OpenStudy (anonymous):
I got 34.09%
OpenStudy (anonymous):
if you like percents , ok
OpenStudy (anonymous):
Thanks!
OpenStudy (anonymous):
yw