Question

Please help! A material decays a a rate of 1.1% per year. If you start with 250 grams of the material, how much will left in 15 years? Round to the nearest whole gram. What equation correctly models the situation?

Answer 1

250[1+{1.1/100}]^15

Answer 2

250=A(.011)^15?

Answer 3

exponential decay has a negative exponent

Answer 4

perse ...

Answer 5

A{0} - A{0}(.011)

A{0} (1 - .011) per year

Answer 6

A{n} = 250(1-.011)^(15) = 211.7797... i think

Answer 7

Thank you :)

Answer 8

yep :)