Okey so the area of a circle is taken from the equation πr²
now in the sum they have given information as: area of one small circle is 9π
that means :
area of small circle = πr²
= π3²
= π9
so in the sum they have given us the radius of one circle as 3
from this information we understand that the diameter of one small circle should be = 3 ×2
= 6 (as diameter is twice the radius)
we are given 3 of these circles. that means there are 3 times the diameter measured.
so the diameter of the large circle is = 6×3 = 18
as we calculated, since 18 is the diameter of the large circle, it should be taken ½ for radius.
radius of large circle = 18÷2
= 9
now we know the radius of large circle.
taking the equation 'πr²' to find the area:
area of large circle = πr²
= π9²
= π81
your answer is 81π
Answer:
(0.3478, 0.5522)
Step-by-step explanation:
Given:
Total number of red marbles, x = 45
Total number of marbles, n = 100
Phat = x / n = 45 / 100 = 0.45
The confidence interval, C.I is given by :
Phat ± Zcritical * standard error
Phat ± Zcritical * √Phat(1 - Phat) / n
Zcritical at 96% = 2.0537
The standard error = √Phat(1 - Phat) / n
S.E = √(0.45 * 0.55) / 100 = 0.0497493
C.I = 0.45 ± (2.0537 * 0.0497493)
C.I = 0.45 ± 0.10217013741
C. I = (0.3478, 0.5522)
The first one is the answer
Answer is 35/7 like a fraction and 35÷7 and 7√35
Answer:
I think there's 502
Step-by-step explanation:
if this is a olunomical question that should be it I believe, because you have to write in standered form then when it equals zero, then factor it