First we define the variable to be used:
x: half-life time period
The equation for this problem can be modeled as:
y = A * (b) ^ x
Where,
A: initial amount
b: decrease rate.
For example:
if there are 100 atoms, after one half-life time period, 50 atoms remain:
y = 100 * (0.50) ^ x
after one half-life time period (x = 1):
y = 100 * (0.50) ^ 1
y = 50
The equation that models the problem is:
y = 16 * (0.50) ^ x
The table is:
1 8
2 4
3 2
4 1
5 0.5
Answer:
Eric practiced the piano for 2 hours this week
Step-by-step explanation:
If it tells us that Eric spent 1/4 of the time playing the piano and all the time he practice this week was 8 hours, then we have to multiply the 8 hours by 1/4
p = time he practice piano
p = 8h * 1/4
p = 2h
Eric practiced the piano for 2 hours this week
Well I found the number that you are referring to: (686,293) right?
anyway,I'm assuming that it's talking about the number 8 in the number which would be the Ten Thousands place.
Answer:
![P(x)=8x-150](https://tex.z-dn.net/?f=P%28x%29%3D8x-150)
Step-by-step explanation:
Let
x-----> the number of shirts
we know that
The equation of the cost is equal to
![C(x)=2x+150](https://tex.z-dn.net/?f=C%28x%29%3D2x%2B150)
The equation of the sell is equal to
![S(x)=10x](https://tex.z-dn.net/?f=S%28x%29%3D10x)
The equation of the profit is equal to
![P(x)=S(x)-C(x)](https://tex.z-dn.net/?f=P%28x%29%3DS%28x%29-C%28x%29)
substitute the values
![P(x)=10x-(2x+150)=8x-150](https://tex.z-dn.net/?f=P%28x%29%3D10x-%282x%2B150%29%3D8x-150)
Answer:
45
Step-by-step explanation:
I hope this helps!