Answered

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the number of bacteria in a culture is increasing according to the law of exponential growth. after 3 hours, there are 400 bacteria, and after 6 hours, there are 3,200 bacteria. write an equation that can be used to determine the number of bacteria y in the culture after t hours.

Sagot :

The number of bacteria y in the culture after x hours will be y = 50(2)ˣ.

What is exponential growth ?

An exponential function faster and faster after every next value of the independent variable.

According to the given question the number of bacteria in a culture is increasing according to the law of exponential growth. after 3 hours, there are 400 bacteria, and after 6 hours, there are 3,200 bacteria.

We use the exponential growth equation y = arˣ where a is the initial value and r is common ratio and x represents time.

so 400=ar^3...(i)  and 3200= ar^6...(i)

Dividing equation (ii) by equation (i) and solve for r we get r³ so r =2

substitute r into first equation 400=a(2)³

8a = 400.

a = 50.

∴ The no. of bacteria at any given time x will be.        ( t is replaced by x)

y = 50(2)ˣ.

learn more about exponential growth here :

https://brainly.com/question/11487261

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