What is the significance of Malcolm's army carrying branches from Birnam wood to the castle?
A. The witches predicted Macbeth's army would be defeated only if
Birnam wood comes to his castle.
B. Macbeth's castle is surrounded by Birnam wood and will be left
unprotected without it.
O c. It shows that Malcolm's army is mightier than Macbeth's and
should easily defeat Macbeth.
O D. Birnam wood is sacred, and destroying it shows Malcolm's greed
and lust for power.

Explanation:

what I know is that

they did that to hide the large number of their soldiers

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

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