Answer:
0.65
Step-by-step explanation:
Add together 7 and 13: there are 20 cards.
Then the theoretical probability of selecting a red card will be:
13
------- = 0.65
20
Answer:
a=15.21 ft^2
Step-by-step explanation:
a=pi(r)^2
d=2r
A=1/4pi(d)^2=1/4pi(4.4)^2=15.20531ft^2
Answer: 
Step-by-step explanation:
The missing figure is attached.
The perimeter of a rectangle is:

Where "l" is the lenght and "w" is the width.
You can identify in the figure that:

Then, knowing the perimeter of the rectangle, you can make the subsitution into the formula:

Now you must simplify and solve for "z"

Finally, substituting the value of "z" into
, you get:

Answer:
the idea is to devide the shape into 3 smaller parts.
Step-by-step explanation:
devide it to three areas :
> semi-circle (0.5 * pi * R), R=5
>Square (10 * 10)
> triangle (0.5 * base * height),
bsse =10, height =7
Add them together.