Henry is conducting an experiment with 800 bacteria. he found the exponential growth rate to be 2.7% per hour. what is the amount of bacteria after 21 hours? round to the nearest whole number.
(hint: use the exponential growth formula : y= b(1+r)^t)

Plug the information into the formula. then solve the equation you get and round to the nearest whole number. Hope this helps :) if you need anything else just ask

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm