Read this sentence from the main text:

you may not know this but you are home to a colony of bacteria.

what purpose does this sentence serve in the opening paragraph? (7 points)

it introduces the main focus of the article and creates interest.

it summarizes the main point of the new science of microbes.

it suggests that microbes are unhealthy and invasive.

it uses a well-known fact to engage readers

It summarizes the main point of the new science of microbes.

It suggests that microbes are unhealthy and invasive.

It uses a well-known fact to engage readers

this is the answer , p = 1 + (1/10)x

step-by-step explanation:

we have,

at sea level pressure is 1 atmosphere (i.e at x =0, p0=1 atmosphere)

at depth 23 meters , pressure = 3.3 atmosphere

since the pressure increases at constant rate as the depth increases, so we can write a relation as:

p =p0 +   kx   , where p is the pressure  , p0 is the initial pressure, x is the depth and k is constant rate of increasing.

to find constant rate k, plug p = 3.3 , p0 = 1 and x= 23 meters

we get,

  3.3 = 1 + k * 23

k = 2.3 / 23   = 1/10

so we can write the function formula as:   p = 1 + (1/10)x