I don't really know what to say to explain it but mines everything and you'll find the answer
Answer:
Celsius * 9/5 + 32 = Fahrenheit
Step-by-step explanation:
Answer: x^2 + 4x + 4
Explanation:
just expand, factor out, and add together.
(x+2)(x+2)
x • x = x^2
2x + 2x = 4x
2 • 2 = 4
x^2 + 4x + 4
Answer:
a) 4800 bacteria
b) ![y(t) = 300(4)^t](https://tex.z-dn.net/?f=y%28t%29%20%3D%20300%284%29%5Et)
c) 754 bacteria
Step-by-step explanation:
A bacteria culture starts with 300 bacteria and doubles in size every half hour.
This means that the number of bacteria after t periods of half hour is given by:
![y(t) = 300*(2)^{t}](https://tex.z-dn.net/?f=y%28t%29%20%3D%20300%2A%282%29%5E%7Bt%7D)
(a) How many bacteria are there after 2 hours?
2 hours is 2*60/30 = 4 periods of 2 hours, so this is y(4).
![y(4) = 300*(2)^{4} = 300*16 = 4800](https://tex.z-dn.net/?f=y%284%29%20%3D%20300%2A%282%29%5E%7B4%7D%20%3D%20300%2A16%20%3D%204800)
(b) How many bacteria are there after t hours?
It doubles every half hour, so each hour, it is multiplied by 4. Then
![y(t) = 300(4)^t](https://tex.z-dn.net/?f=y%28t%29%20%3D%20300%284%29%5Et)
(c) How many bacteria are there after 40 minutes?
40 minutes is 40/30 = 1.33 periods of half hour. So this is y(1.33).
![y(1.33) = 300*(2)^{1.33} = 754](https://tex.z-dn.net/?f=y%281.33%29%20%3D%20300%2A%282%29%5E%7B1.33%7D%20%3D%20754)
Answer: x = 11
Explanation: if u want more math questions just ask me ok