145k views
3 votes
PLEASE HELP IM SO CONFUSED WITH THIS!!!!

PLEASE HELP IM SO CONFUSED WITH THIS!!!!-example-1

1 Answer

0 votes

Answer:


(91)/(400)

Explanation:

Given:

A square (all sides are equal)

AC = 20 (diagonal)

PI = 7

First, we can find the side length of the whole square:


d(diagonal) = a √(2)


a √(2) = 20

Divide both sides of the equation by 2 to make a the subject:


a = (20)/( √(2) ) = (20 √(2) )/(2) = 10 √(2)

Now, let's do the same thing, but with the smaller square on the top right:


pr √(2) = 7


pr = ri = (7)/( √(2) ) = (7 √(2) )/(2) = 3.5 √(2)


ic = 10 √(2) - 3.5 √(2) = 6.5 √(2)

We also have to find the areas of the shaded rectangles and the whole square:


a(shaded) = 6. 5√(2) * 3.5 √(2) = 45.5


a(square) = ({10 √(2)) }^(2) = 200

Let's call the event A:

A - "The dart hits the shaded region"

All outcomes:

n = 200 (since it can randomly hit the whole area)

Favorable outcomes:

m (A) = 45,5 (since it only need to hit the shaded region)


p(a) = (m(a))/(n) = (45.5)/(200) = (91)/(400)

User Saeed Mohtasham
by
8.2k points

No related questions found