Which word could best substitute the (underlined) portion of the sentence?

the students are working on a mystery message and they have found a computer program to them with the (process of encoding their message.)

cipher
decipher
encryption
cryptanalyst

cryptanalyst

Explanation:

Cryptoanalysis is the art of trying to discover the ciphertext and / or logic used in your encryption (key). The people who participate in this effort are called cryptanalysts. in other words, a cryotoanalysis is a "process of encoding the message" and therefore, the word that would best substitute words in parentheses is "cryptanalyst".

i will try let me see what they are first

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