The half-life of cesium-137 is 30 years. suppose we have a 100-mg sample. (a) find the mass that remains after years. (b) how much of the sample remains after 100 years? (c) after how long will only 1 mg remain?

hi there!

step-by-step explanation:

a roof pitch is basically for every inch rise there is 12 inches run.

the height of the roof is also known as the rafter.

formula: rafter^2 = rise^2 + run^2

rafter^2 = 5^2 + 12^2

rafter^2 = 25 + 144

rafter ^2 = 169"^2

the height of the roof from the lowest point to the highest point is 169"^2.

hope this : )