9. how many lines of symmetry does the triangle have? (1 point) a.3 b.2 c.1 d.0

What is the common difference in the following arithmetic sequence? 7,3,-1,-5

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.)

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.