A^2+b^2=c^2
20^2+b^2=29^2
400+b^2=841
-400. -400
b^2=√441
b=21
Answer:
350 meters per second
Step-by-step explanation:
To estimate the distance at which an artillery is fired from or the distance of travel of a missile shot, the flash to bang methodology of calculation is used, whereby the number of seconds it takes the bang to reach us after the flash is multiplied by the speed of sound (350 m/s). The result is the distance between the listener and the explosion site.
Answer:
always
Step-by-step explanation:
Indirect proof.
Answer:
1/36
Step-by-step explanation:
Given the sample space
S= [$1, $2, $5, $10, $20, $50] = 6
Hence the probability of choosing a
$5 bill is
Pr($5) = 1/6
Also the probability of choosing a $20 bill is
Pr($20) = 1/6
Therefore the probability of choosing a $5 bill and a $20 bill
Pr($5,$20) = 1/6*1/6= 1/36
First, find the z-score:
z = (value - mean) / sdev
= (275 - 280) / 15
= - 0.33
In order to use a standard normal table, we need a positive z-score:
P(z < -0.33) = 1 - P(z < 0.33)
Looking at the table, we find P(z < 0.33) = 0.6293
Therefore:
P(z < -0.33) = 1 - 0.6293 = 0.3707
Hence, you have a probability of about 37% <span>that a randomly selected pregnancy lasts less than 275 days.</span>
