Answer:
123 m
Step-by-step explanation:
Assuming the height of the shadow of tower is taken at the same time the height of shadow of a tree is taken, the magnification factor is the same
The ratio of image to object for tree will be 1.32/3.5=0.377142857
The same ratio is applied for the tower, therefore, the real height of tower will be 46.5/0.377142857
=123.2954545
To the nearest meter, the height is approximately 123 m
Answer:
<h3 />
Step-by-step explanation:
C = 2 x r x π = 2 x 9 x π = 18 π cm
Equation: 20x=1200
divide by 20
The theater has 60 rows
Answer:
0.5160
Step-by-step explanation:
Xi:"i-th Signal"
Xi=1, False alarm
Xi=0, True error
X=Ber(p=0.07)
Y=Bin(n=10, p=0.07)
= (3/4 + 1/3)/(1/6 + 3/4)
= (3/4 + 1/3)/(1/6 + 3/4)
Multiply numerator and denoiminator by 12
=12(3/4+1/3) / 12(1/6 + 3/4)
= (3*3 + 1*4) / (2 + 3*3)
= 13/11
