Answer:
94.5 days
Step-by-step explanation:
We are asked to calculate the time.
The formula to calculate the time for half life =
t = t½ × In (Nt/No)/-In2
t½ = half life = 16 days
No = Initial substance = 120mg
Nt = Amount of substances after time t = 2 mg
t = 16 × In (2/120)/-In2
t = 94.510249529736 days
Approximately = 94.5 days
Therefore, the time it would take for the substance to decay from 120mg to 2 mg is 94.5 days.
2r²+15r-50
hope this helps
Answer:
400
Step-by-step explanation:
Multiply the whole number by the percentage. The number must be a decimal.
Use the rule that x^(-k) = 1/(x^k) to get
(-3)^(-5) = 1/( (-3)^5 ) = 1/( -243 )
Comparing 1/( -243 ) with the form 1/x, we see that x = -243
<h3>Answer: -243</h3>
Answer: y = 0.2 x
Step-by-step explanation:
Since, a variable whose variation does not depend on that of another is called independent variable.
Here, given expression is,
6 x +y = 4 x +11 y
⇒ 6 x - 4 x + y = 11 y
⇒ 2 x = 11 y -y
⇒ 2 x = 10 y
⇒ 0.2 x = y
Thus, the value of x does not dependent on the value of y.
Therefore, x is independent variable.
Thus, required answer is y = 0.2 x.
