I'm going to assume the 4 and 3 are exponents and the expression is .
The first step is to separate the coefficients of 3 and -6 from the variables and to multiply those as normal:
As for the variables, you want to recognize that means and means , so
In total, there are 7 a's being multiplied, so
Putting this all together, we have:
Answer:
The hourly decay rate is of 1.25%, so the hourly rate of change is of -1.25%.
The function to represent the mass of the sample after t days is
Step-by-step explanation:
Exponential equation of decay:
The exponential equation for the amount of a substance is given by:
In which A(0) is the initial amount and r is the decay rate, as a decimal.
Hourly rate of change:
Decreases 26% by day. A day has 24 hours. This means that ; We use this to find r.
The hourly decay rate is of 1.25%, so the hourly rate of change is of -1.25%.
Starts out with 810 grams of Element X
This means that
Element X is a radioactive isotope such that its mass decreases by 26% every day.
This means that we use, for this equation, r = 0.26.
The equation is:
The function to represent the mass of the sample after t days is
10^9x5.5
So basically it’s like your just adding the zeros at the end except this preference as opposed to seeing all those zeros so scientists chose this method .
Answer:
its 7
Step-by-step explanation:
7
Answer:
1. fraction is 64/100 and decimal is 0.64
2. 12.5 is percent, decimal is 0.125
3. 140 is percent, I think is 1 2/5
4. 2.75 is decimal, 275 as percent
5. 0.08 is decimal, I think is 16/25