Question

A bacteria culture begins with 13 bacteria which triple in amount at the end of every hour. How many bacteria are grown during the 10th hour?
A. 13,312
B. 26,624
C. 255,879
D. 2,302,911

Answer 1

C because you would do 13 times 3 and you would do that 10 times to get the answer.

Answer 2

Answer:

(C) 255879

Step-by-step explanation:

The bacteria culture begins with 13 bacteria which triples in amount at end of an hour, therefore, the amount of bacteria grown at end of one hour= 13×3=39,

The amount of bacteria grown at end of two hour= 39×3=117,

The amount of bacteria grown at end of third hour=117×3=351,

The amount of bacteria grown at end of fourth hour=351×3=1053,

The amount of bacteria grown at end of fifth hour=1053×3=3159,

The amount of bacteria grown at end of sixth hour=3159×3=9477,

The amount of bacteria grown at end of seventh hour=9477×3=28431.

The amount of bacteria grown at end of eighth hour=28431×3=85293,

The amount of bacteria grown at end of ninth hour=85293×3=255879, since the bacteria grown in starting hour will be 13 only, therefore the bacteria grown during 10th hour will be 255879.