PLS HELP NO LINKS AND ILL GIVE BRAINLIEST
2 answers:
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Answer:
a) It takes 0.0017s for the light to reach San Francisco.
b) It takes 0.033s for the light to reach London.
c) It takes 1.334s for the light to reach Mars.
d) It takes 149.7s for the light to reach Venus.
Step-by-step explanation:
Here we can solve this problem by using this following formula:
In which s is the speed(in km/s), d is the distance(in km) and t is the time(in s).
The light speed is 299 792 458 m / s = 299,792.458 km/s, so
(a) San Francisco (about 500km)
Find t when . So
It takes 0.0017s for the light to reach San Francisco.
b) London(about 10,000km)
Find t when . So
It takes 0.033s for the light to reach London.
(c) the Moon (400,000km)
Find t when . So
It takes 1.334s for the light to reach Mars.
(d) Venus (0.3 A.U. from Earth at its closest approach).
Each A.U. has 149,59,7871 km.
So 0.3 A.U. = 0.3*(149,597,871) = 44,879,361.3. This means that . So:
It takes 149.7s for the light to reach Venus.
The confidence interval for the mean usage of water is (18.7,20.5).
Given population standard deviation of 2.4, mean of 19.5 gallons per day and confidence interval of 98%.
We have to find the confidence interval for the mean usage of water.
To find out the confidence interval we have to first find margin of error.
μ=19.5
σ=2.4
α=0.98
α/2=0.49
We have to find the z value for the p value 0.49 which is z=2.33
Margin of error=z*μ/
=2.33*19.5/
=0.82
lower level=mean -m
=19.5-0.82
=18.68
after rounding upto 1 decimal
=18.7
upper mean = mean+m
=19.5+0.82
=20.52
Hence the confidence interval for the usage of water is (18.7,20.52).
Learn more about margin of error at brainly.com/question/10218601
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