HELP! MEDAL WILL BE GIVEN!
A material decays at a rate of 1.1% per year. If you start with 250 grams of the material, how much will be left in 15 years? Round to the nearest whole gram.

Write a equation that correctly models the situation!

Question

HELP! MEDAL WILL BE GIVEN!
A material decays at a rate of 1.1% per year. If you start with 250 grams of the material, how much will be left in 15 years? Round to the nearest whole gram.

Write a equation that correctly models the situation!

anonymous · Answer

@HELP!!!!

anonymous · Answer

what are the choices?

mathmate · Answer

It's like the compound interest formula, but with a negative rate (of interest).

anonymous · Answer

There are no choices:( But it should look something like this: A=250(.011)^15 <-- But that is not correct.

jessiegonzales · Answer

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

mathmate · Answer

Compound interest formula is
$A=P(1+i)^t$

anonymous · Answer

@jessiegonzales is correct

anonymous · Answer

@jessiegonzales That looks right! Thank you so much!

jessiegonzales · Answer

YW :)