Radium- $221$ has a half-life of $30 \mathrm {~s}$ . Suppose we have a $300 \mathrm {~g}$ sample.
(a) Find a formula for the mass remaining after $t$ seconds.
(b) How much of the sample remains after $200$ seconds?
(c) After how long will only $20 \mathrm {~g}$ remain?

Question

Quizplus · Accepted Answer

The Answer of Radium- $221$ has a half-life of $30 \mathrm {~s}$ . Suppose we have a $300 \mathrm {~g}$ sample.
(a) Find a formula for the mass remaining after $t$ seconds.
(b) How much of the sample remains after $200$ seconds?
(c) After how long will only $20 \mathrm {~g}$ remain?

Radium- 221221221 Has a Half-Life Of 30 s30 \mathrm {~s}30 s Suppose We Have A Of 30

Radium- $221$ Has a Half-Life Of $30 \mathrm {~s}$ Suppose We Have A Of 30