9.

which sentence best shows correct comma usage?

a.

it was a hot, humid, afternoon when we decided to head for the beach.

b.

it was a hot, humid afternoon when we decided to head for the beach.

c.

it was a hot humid afternoon, when we decided to head for the beach.

d.

it was a hot humid afternoon, when we decided, to head for the beach.

B). It was a hot, humid afternoon when we decided to head for the beach.

Explanation:

In the given question, option B reflects the sentence with a correct comma usage as it joins the two coordinating adjectives together that modifies/qualifies the same noun 'afternoon'. The other options are incorrect as they place the comma inappropriately.

In option A, the comma precedes the noun 'afternoon' that is grammatically incorrect while in options C and D, the coma precede the conjunction 'when' which is also grammatically incorrect as according to the rules a comma precedes a conjunction only when two independent clauses are joined together which is not the case here(an independent clause is being followed by a dependent clause here). Thus, option B is the correct answer.

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

odysseus shows many acts of bravery in homer's epic poem the odyssey. first, he shows bravery when he tricks polyphemus, the cyclops, and gouges out his eye. this is an act of bravery. it will also cost him because polyphemus was the son of poseidon, the god of the sea.

explanation: