Alamp is twice as far in front of a plane mirror as a person
is. light from the lamp reaches the person via two paths. it
strikesthe mirror at a 30.0 degree angle of incidence and reflects
from itbefore reaching the person. it also travels directly to the
personwithout reflecting. find the ratio of the travel time along
thereflected path to the travel tiem along the direct path.

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =

no

explanation:

no i dont know how to solve this you should probably try to google the answer