A radio-active atom has a half-life of a day. This means that it decays by 1/2 each day. Write an equation for this exponential function if you start with 64 grams.

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What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?

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