Question

An element with a mass of 330 grams decays by

25.5% per minute. How much of the element is
remaining after 5 minutes? Round to the nearest
tenth of a gram.

Answer 1

below

Explanation:

Each minute 74.5 % remains or .745 remains

in 5 minutes , this much would remain : .745^5 = .229 of 330 gm

.229 * 330 = 75.7 gm remains