and my last problem i need help with. i don't know how to even begin settin the problem up to figure out the answer.

E coli, a typical bacterius, is about 2 micrometers long. how many E coli could you line up, end-to-end, in one mm?

2*10^-6 m long

1 mm = 10^-3 m

2 * 10^-6 n = 10^-3
2 n = 10^3 = 1000
n = 500

would you please explain how you got this answer? Im not sure what the calculations are that you used. thank you so much.

What does ^ stand for?

To begin solving this problem, we need to convert the given measurements to the same unit. The length of E. coli given is in micrometers, and we need to find how many can fit in one millimeter.

First, let's make sure we understand the conversion between micrometers and millimeters. There are 1,000 micrometers in one millimeter.

Now, to find the number of E. coli lined up in one millimeter, we divide the length of one millimeter by the length of E. coli.

1 millimeter = 1,000 micrometers

2 micrometers (length of one E. coli)

To find the number of E. coli that can fit in 1 millimeter, we divide 1,000 micrometers (1 millimeter) by 2 micrometers (length of one E. coli).

1,000 micrometers / 2 micrometers = 500 E. coli

Therefore, you could line up 500 E. coli end-to-end in one millimeter.