The mean is the total equal the average
Then divide the total number
Answer:
4 markers
Step-by-step explanation:
1/2 miles divided by 1/8 miles equals 4 markers.
1/2 ÷ 1/8
Apply the fraction rule:
1/2 × 8/1
Cross cancel common factor 2:
= 4/1
= 4
Hope this helps!
3^2 is 9 then you multiply by 2 to get 18 then 6-18 is -12
Answer:
its C)11,460
Step-by-step explanation:
you have to multiply 12,000 by the tax rate which is 960.So then you add them up and its 12,960 plus the 500 of the fees which is 13,460. Finally you subtract 13,460 by 2,000 and its C)11,460
Answer:
a) The half life of the substance is 22.76 years.
b) 5.34 years for the sample to decay to 85% of its original amount
Step-by-step explanation:
The amount of the radioactive substance after t years is modeled by the following equation:
In which P(0) is the initial amount and r is the decay rate.
A sample of a radioactive substance decayed to 97% of its original amount after a year.
This means that:
Then
So
(a) What is the half-life of the substance?
This is t for which P(t) = 0.5P(0). So
The half life of the substance is 22.76 years.
(b) How long would it take the sample to decay to 85% of its original amount?
This is t for which P(t) = 0.85P(0). So
5.34 years for the sample to decay to 85% of its original amount