Friedman and Johnson (1997) show that for a wide range of dynamic optimization problems, supermodularity is both necessary and sufficient for monotone static results. In the present context, this implies that our supermodular model requires the minimum set of assumptions to obtain monotonicity in the optimal decision variables.
2
The evidence presented here needs to be supplemented with information about inter- and intrafamily income transfers. This issue was addressed in a follow-up survey, but analysis of the results is not yet complete.
Anim na Madaling Paraan upang Matulungan ang Mga Tao sa Pilipinas
Tumulong sa pagbuo ng mga silid-aralan, aklatan at iba pang mahahalagang istraktura sa mga lugar na kanayunan. ...
Pondohan ang edukasyon ng isang bata. ...
Tulungan ang mga tao sa Pilipinas na makahanap ng mga pagkakataon sa negosyo at pangkabuhayan. ...
Tumulong sa pagbuo ng mga tahanan para sa mga pamilyang walang tirahan.
Protective systems are methods of protecting workers from cave-ins of material that can fall or roll into an excavation, or from the collapse of nearby structures. As mentioned in earlier chapters, if an excavation is less than 5 feet deep, OSHA does not require a protective systems unless the competent person sees signs of a potential cave-in. (It is important to remember that a wall collapse in a trench four and 1/2 feet deep can still have serious results!) For trenches between 5 feet and 20 feet deep, shoring and sheeting, shielding, sloping and benching are all acceptable protective measures. It is up to the planners of the construction project and the competent person on site to determine which systems will work best. If an excavation is greater than 20 feet deep, a registered professional engineer must design the protective system.
Shoring systems are structures of timber, mechanical, or hydraulic systems that support the sides of an excavation and which are designed to prevent cave-ins.Sheeting is a type of shoring system that keeps the earth in position. It can be driven into the ground or work in conjunction with a shoring system. Driven sheeting is most frequently used for excavations open for long periods of time. Another type of sheeting, in which plates or shoring grade plywood (sometimes called Finland form) is used in conjunction with strutted systems such as hydraulic or timber shoring. These strutted systems are also referred to as active systems. The most frequently used strutted system involves aluminum hydraulic shoreswhich are lightweight, re-usable and installed and removed completely from above
Answer: 3,240,000 L
Explanation:
Each tree requires 20 L of water per day for 180 days.
Each tree therefore requires;
= 20 * 180
= 3,600 L per day
There are 900 trees to be grown;
= 900 * 3,600
= 3,240,000 L of water are required for 900 trees.
