9. A biologist has been studying the effects of environmental stressors ona population of frogs. The observations are shown in the table.Time (years)012 3 4 5Onde Frog Population 575 460 368 294 235 188a) By what percent is the frog population declining every year?thot

Let at nth year the population be Pn, then % decrease in nth year is given by {(Pn-1…

Answered: 9. A biologist has been studying the…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

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industrial workers during the years 1980-87. The consumer price indices for these years with 1980 as base we 10-35. The table given below shows the average wages in rupees per week of a group of are also shown: : 1980 Year Average Wage of Workers (Rs.) . Consumer Price Index () Determine the Real Wage of workers during the years 1980-87 as compared with their wages in 1981 1982 1983 1984 1985 1986 1987 119 133 144 157 175 184 189 194 100 107-6 106-6 107-6 116-2 118-9 119-8 120-2 1980. (ii) Determine the purchasing power of Rupee for the year 1987 as compared te the year 1980. What is the significance of this result ? res
Barrow, Alaska 40 33.6 33.3 29.7 30 27.0 20 14.4 8.8 10 10 --6.9 -9.1 20 -17.2 19.3 -21.1 -23.7 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month Data from National Climatic Data Center Record the monthly increases and decreases in the low temperature from the previous month. Monthly Increase or Decrease (from the previous month) Month February March April May June Average Daily Low Temperature (in degrees Fahrenheit)
34. Book Collection Between 1980 and 2000 a rare book collec- tor purchased books for his collection at the rate of 40 books per year. Use this information to complete the following table. (Note that not every year is given in the table.) Year Number of books Year Number of books 1980 420 1995 1981 460 1997 1982 1998 1985 1999 1990 2000 1220 1992
16 In 1970, the U.S. Armed Services instituted a lottery as a random selection process when 19- year old males were drafted into service. Each of the possible 366 possible birth dates was placed in a separate capsule and each capsule was placed in a large plastic drum. Those with the lowest lottery numbers were drafted before others. For example, the May 9th was 176. This meant that there would be 175 groups of males born on other days drafted before those who had been born on May 9th. The scatter plot below shows the median draft eligible number for each month of the year. The line that connects the points is sometimes called a median trace line. Which one of the following statement is TRUE? * Median Trace of Draft Lottery Numbers 240 220- 200- 180- 160 140 120 100 F M. A Median Draft Number to
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220 people are asked how many siblings they have? # of Siblings Frequency Relative Frequency Cumulative Frequency 0 0.2455 54 1 37 91 2 44 0.2 3 45 0.2045 180 4 40 0.1818 220 a. Complete the table (Use 4 decimal places when applicable) b. What percent of the people have exactly one sibling? %
Part 2. Complete the following statements. A) The cumulative enrolment is the ________ of the enrolment of the intervals smaller than the interval in question or equal to the latter. The graph of cumulative enrolment is represented by a function in ___________. B) The average, median and mode are three measures of _________ ____________. C) The term ________ refers to any data that deviates disproportionately from others. D) When the residual values are zero, then the correlation is called _________
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eat out or in The overall change in the consumer price index is a weighted average of changes in various categories. on november 19, 2011 the boston globe reported the data displayed in figure 5.7. the change in the CPI for food is a weighted average of the change in the cost of food at home and the change in the cost of food away from home. find the weights.
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9. A biologist has been studying the effects of environmental stressors on a population of frogs. The observations are shown in the table. Time (years) 0 1 2 3 4 5 Frog Population 575 460 368 294 235 188 a) By what percent is the frog population declining every year? thot