In a lab experiment, the decay of a radioactive isotope is being observed. At the beginning of the first day of the experiment the mass of the substance was 400 grams
and mass was decreasing by 13% per day. Determine the mass of the radioactive
sample at the beginning of the 12th day of the experiment. Round to the nearest tenth
(if necessary).

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

4. find the geometric mean of 4 and 12. 24 8

Assume that 1400 births are randomly selected and 1378 of the births are girls. use subjective judgment to describe the number of girls as significantly high, significantly low, or neither significantly low nor significantly high. choose the correct answer below. a. the number of girls is neither significantly low nor significantly high. b. the number of girls is significantly high. c. the number of girls is significantly low. d. it is impossible to make a judgment with the given information.