A bacteria culture initially contains 2500 bacteria and doubles every half hour.

Find the size of the baterial population after 40 minutes.

Find the size of the baterial population after 7 hours.

35000

Step-by-step explanation:

I don't know the first one but I do know that in 7 hours it will be 35000

1. 3333.33

2. 20,480,000

Step-by-step explanation:

1. first term = 2500microganism.

in ten minutes = 2500/3=833.33

some organisms do not completely divide.

first term + ten minutes

=2500+833.33 = 3333.33 organisms

2. using geometric progression with formula Tn=ar^n-1

r=common ratio = for this question it is 2.

a = first term

therefore, 30 minutes=1st term

so, 7hours = 14th term

T14 = 2500*2^ (14-1)

= 2500*2^13

= 2500*8192

= 20,480,000 micoorganisms