The area of circle Z is 641 ft.
What is the value of r?
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r= 4 ft
r= 8 ft
r= 16 ft
r= 32 ft
Area

I think  the radius would be 14.28ft

Step-by-step explanation:

Area of circle is pi r^2

Area of circle=641ft

so that means you have to divide 641/3.14 because the point of the question is finding the radius.

so 641/3.14=204.140127

then for the final step finding the square root which is about 14.28ft

that means the radius is 14.28ft.

blue marble is 15 times out of 50 = 15/50 reduces to 3/10

landing on tails is 24 out of 50 = 24/50 reduces to 12/25

to find the probability of both multiply together:

3/10 x 12/25 = 3 x 12 / 10 x 25 = 36/250

if you multiplied the numerator and denominator by 10 you get 360/2500.

the answer is 360/2500