What is the growth rate of a population of 1000 that has 20 births per 100 individuals, and 10 death per 100 individuals? Group of answer choices 0.20 0.30 0.10 10

Children are one of the major concerns of environmental exposure. What is the CDI for a 10 month old child exposed to drinking water contaminated with 10 mg/L nitrate (as N). Assume a 1 year exposure time and a 1 year averaging time. Enter your numerical answer with 2 significant figures in units of mg/kg-d (answers with a different # of significant figures will be marked incorrect).

A water treatment plant in a city is to be upgraded to meet the needs of the population in the year 2025, and the water distribution system is to be expanded to meet the needs of the population in the year 2045 or 2055. The 2010-population of the city was 225000, and based on a saturation population of 2,500,000, the 2070-population is estimated to be 420000. Estimate, using decreasing rate of increase method, the city's population in 2025, 2045 and 2055 to facilitate the design of these systems. Don't attempt wrong

For Problem 19.22 , determine the probability (assuming normal distribution) that a light bulb would have a life expectancy between 800 and 1000 hours.

A water supply company delivered an annual quantity of 5,000,000 m³, assuming an average leakage of 7%. On the maximum consumption day, the registered delivery was as follows: Hour 1 2 3 4 5 6 7 8 9 10 11 12 989 945 902 727 | 844 | 1164 | 1571 | 1600 | 1775 | 1964 | 2066 | 2110 Hour 13 14 15 16 17 18 19 20 21 22 23 24 1660 1309 1091 945 1062 1455 1745 2139 2110 2037 1746 1018 m³ m Determine: a. diurnal peak factors for the area, b. the maximum seasonal variation factor, c. diurnal consumption factors.