How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to funct
1 answer:
This is the formula to find the amt. A of that radioactive substance after time t.
We want to find out low long it will take for A to become half of its original amount.
We don't know the original amount, and the substance is not decaying at a constant rate (but rather an exponential one) so we can't answer that question.
Is there any information you forgot to give? Double check yourself.
We want to find out low long it will take for A to become half of its original amount.
We don't know the original amount, and the substance is not decaying at a constant rate (but rather an exponential one) so we can't answer that question.
Is there any information you forgot to give? Double check yourself.
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Answer:
C. 14 metres cubed
Step-by-step explanation:
The volume of a sphere is denoted by: , where r is the radius, while the volume of a cylinder is denoted by:
, where r is the radius and h is the height.
Here, we know that the sphere and cylinder have the same radius and height. However, the "height" of the sphere is technically just the diameter, which is twice the radius. So, h = 2r. We know the volume of the cylinder is 21, so:
πr³ = 21/2 = 10.5
Now plug this into the volume of a sphere formula:
The answer is C, 14 metres cubed.