Radioactive materials can be described using half-lives. For every half-life that
passes, the amount of radioactive
material decreases by 50%. If you begin
with 40 grams of material, which function
can you use to find y, the amount of the
substance that remains after t half-lives?

Which shows the image of rectangle abcd after the rotation (x, y) → (–y, x)?

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?