Aculture started with 3,000 bacteria. after 2 hours it grew to 3,300 bacteria. predict how many bacteria will be present after 16 hours.
round the answer to the nearest whole number. ( or it won't be right )

 The required number of bacteria after 16 hours is 5400.

Step-by-step explanation:  Given that a culture started with 3,000 bacteria and after 2 hours it grew to 3,300 bacteria.

We are to predict the number of bacteria that will be present after 16 hours.

We have

in 2 hours, the number of bacteria increased from 3000 to 3300.

So, in 2 hours, numbers of bacteria that grew = 3300 - 3000 = 300.

That is, in 1 hour, numbers of bacteria grew will be

Therefore, the number of bacteria that will grew in 16 hours is given by

Hence, the total number of bacteria that will preset after 16 hours will be

Thus, the required number of bacteria after 16 hours is 5400.

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2