In 4.1.83, macbeth says he'll make assurance double sure what does he mean by this? how does he plan to do this

In this scene, Macbeth talks to the apparitions. The first one urges him to be careful of Macduff, but the second one tells him that no man who was born of a woman can hurt him. Macbeth, therefore, concludes that he has nothing to fear because Macduff cannot hurt him. However, he states that he will make "assurance double sure" (he will make doubly sure) by killing Macduff. In this way, he believes, he will ensure Macduff truly does not do anything against him.

not everyone is always right.

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