## mayabam Group Title The half-life of a certain radioactive material is 37 days. An initial amount of the material has a mass of 477 kg. Write an exponential function that models the decay of this material. Find how much radioactive material remains after 6 days. Round your answer to the nearest thousandth. It's multiple choice but in not sure how to type in the answers.. one year ago one year ago

1. keke1996 Group Title

a) b) c) d)

2. keke1996 Group Title

3. mayabam Group Title

A. $y= 477 (1/2)^37x ; 0 kg$ Its ^37x Thats all sopposed to be small but i dont know how to do that. B. $y=477(1/2)^1/37x ; 426.288kg$ Again its ^1/37 x all small C. $y=2 (1/477)^1/37x ; 0.736 kg$ Same again. ^1/37x D. $y=1/2 (1/477)^1/37x ;0.184kg$ ^1/37x All supposed to be small. Like part of the exponent.

4. satellite73 Group Title

i would use $477\times \left(\frac{1}{2}\right)^{\frac{t}{37}}$

5. satellite73 Group Title

to answer the second part, replace $$t$$ by $$6$$ and use a calculator

6. mayabam Group Title

Thanks! (:

7. satellite73 Group Title

yw