Question

5. The half-life of a certain radioactive material is 78 hours. An initial amount of the material has a mass of 790 kg.
Write an exponential function that models the decay of this material. Find how much radioactive material remains after
18 hours. Round your answer to the nearest thousandth

Answer 1

Hm, Y=790(1/2)^ 18/78
That is your exponential function. Now just solve.

Answer 2

See, your initial amount was 790
Your radioactive material is "half-life"
Your power is T (time) so 18/78

Answer 3

thank you!

Answer 4

will you help me with a few more?

Answer 5

I have to get off, sorry :(

Answer 6

its okay

Answer 7

Good luck :)

Answer 8

thanks!