A sample of a radioactive isotope had an initial mass of 200 mg in the year 2000 and decays exponentially over time. A measurement in the year 2004 found that the sample's mass had decayed to 70 mg. What would be the expected mass of the sample in the year 2006, to the nearest whole number?

1. what are the missing reasons in the proof 2. it's in the second picture and 3

What is the vertical asymptotes of the function f(x)=x-2/x*2-3x-4

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103