Answer:
Step-by-step explanation:
The half life is the amount of time it takes a substance to decay to half of its original amount.
Since the radioactive substance has a half life of 1000 years, there will be half of it left after 1000 years.
So, the fraction that will be left after 1000 years is
<em><u>Solution:</u></em>
Given that,
The drawing of a building shown below has a scale of 1 inch to 30 feet
1 inch = 30 feet
The drawing of the building of this problem has the height of 1.25 inches and base of 0.75 inches
<em><u>Thus actual height is given as:</u></em>
height = 1.25 inches
<em><u>The actual base is given as:</u></em>
base = 0.75 inches
Thus actual base is 22.5 feet