The first quartile is:
C. 99.5
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Answer:
Since he is paid per manicure, it is piece rate
Step-by-step explanation:
Answer:
the 1st digit is in the 100s n its 1
step-by-step explanation:
3,589÷18 = 199.389
so the first digit of the quotient is in the 100s n its 1
(i think)
Step-by-step explanation:
Answer:
A. 3
Step-by-step explanation:
Answer:
The percentage rate of decay per year is of 3.25%.
The function showing the mass of the sample remaining after t is 
Step-by-step explanation:
Equation for decay of substance:
The equation that models the amount of a decaying substance after t years is given by:

In which A(0) is the initial amount and r is the decay rate, as a decimal.
Every 21 years, its mass decreases by half.
This means that
. We use this to find r, the percentage rate of decay per year.



![\sqrt[21]{(1-r)^{21}} = \sqrt[21]{0.5}](https://tex.z-dn.net/?f=%5Csqrt%5B21%5D%7B%281-r%29%5E%7B21%7D%7D%20%3D%20%5Csqrt%5B21%5D%7B0.5%7D)



The percentage rate of decay per year is of 3.25%.
Given that the initial mass of a sample of Element X is 80 grams.
This means that 
The equation is:



The function showing the mass of the sample remaining after t is 