LA and ZB are supplementary. ZB and ZC are complementary. ZA must be
(Assume all angle measures are > 0°)
obtuse
B
acute (+ 45°)
C 90°
D) 45°

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|