A Modern Pandemic

During the past 25 years, AIDS has spread throughout the world.

The first cases of AIDS were reported in 1981. Since then, the disease has become a pandemic. Now there are nearly 40 million people infected with HIV, the virus that causes AIDS.

Africa is the hardest-hit continent. More than 60 percent of all the people in the world with HIV live there. But no region has been spared.

Why does the author conclude the article with this passage?

to contrast current events with past events
to place a spotlight on the African continent
to place emphasis on what is happening now
to compare AIDS to diseases mentioned earlierA Modern Pandemic

To place emphasis on what is happening now.

Explanation:

Since it is only talking about AIDS and HIV which is linked to AIDS it's just telling you what is currently happening.

to place emphasis on what is happening now

Explanation:

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