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Zolol [24]
3 years ago
10

The formula NEXT = 2 • NOW models the number of bacteria in a test tube. There were 10 bacteria in the test tube after the first

hour. How many bacteria will be present in the test tube after the fifth hour?
Mathematics
2 answers:
Vitek1552 [10]3 years ago
5 0

Answer:

160

Step-by-step explanation:

NEXT = 2 • NOW

Implies

a(n+1) = 2 × a(n)

a(1) = 10

a(2) = 20

a(3) = 40

a(4) = 80

a(5) = 160

Ad libitum [116K]3 years ago
4 0

Answer:

160 bacteria

Step-by-step explanation:

We can create an exponential function of the form: y=ab^{x-1}, where a is the initial value, b is the rate, and x is the time.

Here, a = 10 and b = 2, so our equation is:

y=ab^{x-1}

y=10*2^{x-1}

We want the number of bacteria present after the fifth hour, or when x = 5, so we have:

y=10*2^{x-1}

y=10*2^{5-1}=10*2^{4}=10*16=160

There were 160 bacteria.

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