Regardless of where portable and mounted oxygen cylinders are stored in the ambulance, they must:
a. hold a minimum capacity of 1,500 L of oxygen.
b. undergo hydrostatic testing on a weekly basis.
c. be capable of delivering oxygen at 1 to 15 L/min.
d. be easily identifiable by their bright green color.

gravity causes stares to cluster i think so

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

b. is the answer hoped i