for each of the following chemical and physical changes carried out at constant pressure, state whether work is done by the system on the surroundings or by the surroundings on the system, or whether the amount of work is negligible. state whether process or reaction is endothermic or exothermic.

Find the number if 3.7% of it is 37% of 37.

Case # 51173878 weighs 814 pounds; case # 51173981 weighs 803 pounds; case # 51174058 weighs 817 pounds; case 51174178 weighs 815 pounds; case # 51174248 weighs 817 pounds; case # 51174495 weighs 781 pounds; case # 51174577 weighs 828 pounds. what are the case #'s of the two cases that weigh the same amount?

Steve has a rectangular gazebo in his back yard with a width of 3 feet less than times its length and an area of 156 square feet. what is the length of the gazebo, rounded to the nearest tenth?