Sample of 500gms radioactive substance decays according to the function A(t)-500-0.044t where t is the time in years. How much of the substance will be left in the sample after 20 years?round to the nearest whole gram

Maybe you mean

A(t) = 500 e^-(.044 t)

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A(20) = 500 e^-.88

= 500 * .415

207.391

To find out how much of the substance will be left after 20 years, we can substitute the value of t = 20 into the given function A(t) = 500 - 0.044t.

A(20) = 500 - 0.044(20)
A(20) = 500 - 0.88
A(20) = 499.12

Rounding this value to the nearest whole gram, we get 499 grams.

Therefore, after 20 years, approximately 499 grams of the radioactive substance will be left in the sample.