Civil and Environmental Engineering Answers

Determine the adequacy of Bolt B when 20mm diameter A325 bolts are used with threaded excluded from the shear planes. Assume the strength of the column and the ST section does not govern. The value of F is 500kN, with a 60-degree angle from the horizontal. Bolts A F Bolts B

How crease recovery can be altered by changing fabric structure and design ?

Suppose you must take the bus to school. The probability that you will have to wait for the bus is 0.25. If you don’t have to wait for the bus the commute takes 20 minutes, but it you must wait for the bus, the commute takes 30 minutes.

Find the standard deviation. 

Round your answer to 2 decimal places.

On May 11, 2013 at 9:30 PM, the probability that moderate seismic activity (one moderate earthquake) would occur in the next 48 hours in Iran was about 21.42%. Suppose you make a bet that a moderate earthquake will occur in Iran during this period. If you win the bet, you win $50. If you lose the bet, you pay $20. Let X = the amount of profit from a bet.

What is the standard deviation of X?  

Round your answer to 3 decimal places.

A hospital researcher is interested in the number of times the average post-op patient will ring the nurse during a 12-hour shift. For a random sample of 50 patients, the following information was obtained. What is the standard deviation?