Question

The count in a bacteria culture was 600 after 10 minutes and 2000 after 30 minutes. Assuming the count grows exponentially,

What was the initial size of the culture? 328.63

Find the doubling period.

Answer #1

This exercise uses the population growth model. The count in a
culture of bacteria was 600 after 2 hours and 38,400 after 6 hours.
What was the initial size of the culture?

This exercise uses the population growth model.
The count in a culture of bacteria was 600 after 2 hours and 38,400
after 6 hours. Find a function that models the number of bacteria
n(t) after t hours. (Enter your answer
in the form
n0ert.
Round your
n0
value to the nearest whole number. Round your r value to two
decimal places.)

The population of a bacteria in a culture grows at a rate
proportional to the number of bacteria present at time t. After 3
hours it is observed that 400 bacteria are present. After 10 hours
2000 bacteria are present. What was the initial number of
bacteria?

a
culture starts with 9000 bacteria. after one hour the count is
10100
a.) find relative growth rate of the bacteria. round answer to
4 decimal places
b.)find the number of bacteria after 2 hours (answer must be
an integer)
c.)after how many hours will the number if bacteria
double?

A given bacteria culture initially contains 1500 bacteria and
doubles every half hour. The number of bacteria p at a given time t
(in minutes) is given by the formula p(t)=1500e^(kt) for some
constant k. (You will need to find k to answer the following.)
a) Find the size of the bacterial population after 110
minutes.
b) Find the size of the bacterial population after 8 hours.

A bacteria culture starts with 1000 bacteria and grows at an
exponential rate. After 3 hours there will be 3000 bacteria. Give
your answer accurate to at least 4 decimal places
(a) Express the population P after t hours as
a function of t.
(b) What will be the population after 2 hours?
(c) How long will it take for the population to reach 1310?

The initial size of the bacteria is 1000. After 3 hours the
bacterium count is 5000.
a. Find the function to model the bacteria population after t
hours.(Round your r value to four decimal places.
b. Find the population after 6.5 hours. Round your answer to the
nearest whole number.
c.When will the population reach 14,000? Round your answer to
one decimal place.

You count 45 colonies of bacteria on a media plate. The culture
was made by plating 1/10 of a mL of culture media that has already
been diluted by a factor of 10,000. What is the best estimate for
the density of bacterial cells in the starting (undiluted)
culture?

The population of bacteria in a culture grows at a rate
proportional to the number of bacteria present at time t. After 2
hours from the beginning, it is observed that 500 bacteria are
present. After 5 hours (from the beginning), 1500 bacteria are
present. What is the initial number of bacteria P0 ?
Hint: Use P(t) = P0ekt
A - 240 at beggining
B - 198 at beggining
C - 541 at the beggining
D - None of the...

The bacteria in a culture increased from 600 at 1:00 P.M. to
3600 at 6:00 P.M.
(a) Find the expression for the number of bacteria t
hours after 1:00 P.M.
Q(t) =
(b) Find the number of bacteria that will be present at 7:00 P.M.
(Round your answer to the nearest whole number.)
bacteria
(c) When will the population reach 18,000? (Round your answer to
one decimal place.)
hr
(d) How long does it take the population to double in...

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