Given formula is
which gives approximate distance a light beam from a light house where "a" represents the area (in sqaure miles) that the light beam covers
Using this formula we have to estimate the distance the light beam covers the area 1000 square miles.
so that means a=1000
Now plug this value into above formula
r = 17.86686878
Hence final answer is approx 17.87 miles
Answer:
Check the explanation
Step-by-step explanation:
1) probability for odd or 00 = (18+1)/38 = 0.5
2) expected value can be calculated as follows :
14 * win probability - 13 * lose probability
=14 * (18/38) - 13*(20/38)
= -0.21
P ( A ) = 0.45 - probability that the land has oil,
P ( B ) = 0.8 - probability that the test predicts it
P ( A ∩ B ) = P ( A ) · P ( B ) = 0.45 · 0.8 = 0.36
Answer: The probability that the land has oil and the test predicts it is 36 %.
Im pretty sure it is 1511