1.A 10 ft. boom is acted upon by the 840-lb forceshown. Determine the tension in each cable and the reactionat the ball-and-socket joint at A.
2.The total annual runoff from small drainage basin is determined to be approximately normal with a mean of 14.0 in. and a variance of 9.0in^2. Determine the probability that the annual runoff from the basin will be less than 11.0 in. in all three of the next three consecutive years.