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?
2 answers:
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
Answer:
160 bacteria
Step-by-step explanation:
We can create an exponential function of the form:
, 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:


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


There were 160 bacteria.
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