Alexander Litvinenko was poisoned with 10 micrograms of the radioactive substance Polonium-210. Since radioactive decay follows a compounded continuously model,
we can determine the amount of substance left in Alexander Litvinenko's body at any
given time. If Polonium-210 has a decay rate of .502%, then determine the amount
of Polonium-210 left in his body after 140 days. Provide 3 decimal places and units
in your answer.
12

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?