take Culture B ÷ culture A
take (4.0 x 10^6) ÷(8.0 x 10^4)
= 50
so D
A lab has two bacteria cultures. Culture A contains 8*10^4 bacteria and culture B contains 4*10^6 bacteria. How do the two cultures compare in size?
A. Culture A contains twice as many bacteria as Culture B
B. Culture A contains 1/2 as many bacteria as Culture B
C. Culture A contains 1/25 as many bacteria as Culture B
D. Culture A contains 1/50 as many bacteria as Culture B
2 answers
Tyler’s math class found that it would take 4.1 x 10 7 dollar bills to cover a square mile area. The surface area of the United States is about 2.37 x 10 7 square miles. About how many dollar bills are needed to cover the United States?
1 answer