The number of animals in a population at the start of year t is Pt The number of animals at the start of year 1 is 500
Given that
P4+1 = 1.01P,
work out the number of animals at the start of year 3

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables

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The triangle rst, rs = 65 and st = 60. which equation could be used to find the value of angle s?