Answer:
72,300 years.
Explanation:
- Initial mass of this sample: 504 grams;
- Current mass of this sample: 63 grams.
What's the ratio between the current and the initial mass of this sample? In other words, what fraction of the initial sample hasn't yet decayed?
.
The value of this fraction starts at 1 decreases to 1/2 of its initial value after every half-life. How many times shall 1/2 be multiplied to 1 before reaching 1/8? 
. It takes three half-lives or 
years to reach that value.
In certain questions the denominator of the fraction is large. It might not even be an integer power of 2. The base-x logarithm function on calculators could help. Evaluate
to find the number of half-lives required. In case the base-x logarithm function isn't available, but the natural logarithm function 
is, apply the following expression (derived from the base-changing formula) to get the same result:
.
Answer:
a hospital department that performs high-risk, time-sensitive surgeries
Explanation:
Answer: False
Explanation: Your body can act to different things it depends on what you take into your body
Answer: 
Explanation:
Given
Camera has an adjustable focal length ranging from 
to 
mm
Power is given by Reciprocal of focal length in meter
Power corresponding to 77 cm
Power corresponding to 224 cm
Therefore, the range of the power is
B
Since it’s from the roof, the basketball will have a greater impact on the ground, causing it to bounce higher.
So B is your answer
