statistics homework help

Question

WebMD.com reports that the average amount of bacteria on a kitchen countertop is 488 bacteria per square inch. How many bacteria would you expect to find on a (rectangular) kitchen countertop that measures 2 feet by 4 feet? Round your answer to the nearest whole number. 

Complete this related conversion factor before solving the problem:

12 inches = 1 foot

? square inches = 1 square foot

How many bacteria would you expect to find on a (rectangular) kitchen countertop that measures 2 feet by 4 feet? Round your answer to the nearest whole number.

 bacteria = ?

Answer 1

12 inches = 1 foot

12 inches x 12 inches = 144 square inches = 1 square foot

2 feet x 4 feet = 8 square feet

8 square feet x 144 square inches/square foot = 1152 square inches

1152 square inches x 488 bacteria/square inch = 562,176 bacteria