Answer:
Percentage of (226Ra) after 900 years is 68%
Step-by-step explanation:
Let P(t) be the amount of (226Ra) present at any time t
Half life of (226 Ra) = 1599 years
If P₀ is initial amount of (226 Ra) then after 1599 years
P(1599)=P₀/2
Decay i amount of radioactive substance is related to time t as
To find value of k
Percentage of radioactive element is:
Amount after 900 years
Answer:
You can buy 7 additional donuts
Step-by-step explanation:
$0.50 times 7 is $3.50 and $7.50 plus $3.50 is $11 dollars so you would be able to get 7 additional donuts
They are similar triangles so 20/4=15/x
solve for x
20x=15*4=60
x=3
So, the line created from the center of the circle to the edge of the circle creates the radius. If it were a straight line from one end of the circle, through the center, to the other end, that would create the diameter.
So, the answer is radius
So the equation for volume is V=Bh
V is volume, B is area of the base, and h is height
To find the area of the base we need to multiply the height times the base of the triangle and divide by 2
(16*12)/2=96
Now multiply times the height
or 24
The volume of the prism of 2304 mm^3
