8. Express as a unit rate. a) A car travelled 120 km in 2 h.
Sean's heart beats 23 times in 20 s.
c) An employee made $48.00 for 4 h work.
d) A hockey player scored 36 goals in 9 games.

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.)

Write a similarity statement for the similar triangles. afgh ~ a

Three students, javier, sam, and corrine, participated in a fundraiser where people donated a certain amount of money per lap that the student ran. each student also had some initial donations that were collected before the run. the equations that represent each student's total donation, y, based on the number of laps ran, x, is shown below. match each equation with the correct rate of change for that student.