Anew rocket-launching system is being considered for deployment of small, short-range rockets. the existing system has p = 0.8 as the probability of a successful launch.
a sample of 40 experimental launches is made with the new system and 34 are successful.

a. construct a 95% confidence interval for p.

b. would you conclude that the new system is better?

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm

The answer is, the streetlight is 18 inches tall.