Which of the following is a vector quantity? A. distance of 25 km along Highway 66
B. a difference of 6°C between Point A and point B
C. an increase in a mass of 14 kg
D. a velocity of 2 m/s Northwest

Answer is in the file below

cutt.ly/nz6VGda

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)