1. Make a study of minimum amount of basic nutrients needed for a 12-year-old child to survive in the world. 2. Find the cost of acquiring these nutrients through the food consumed by these children. 3. Collect Data about the number of children below the age of 12 starting with UAE and any other country and hence calculate the money required for one nutritious meal a day for these children.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.