Highlight the compound sentences in the following extract. Compound Sentence

The modern bicycle has a long and varied history. 

It began its development with the velocipedes or bone-shakers of the nineteenth century, so it has a 200-year pedigree.

The next changes came about with the introduction of high-wheeled bicycles in the late Victorian period. 

These were commonly known as penny-farthings because like the coins one wheel was far larger than the other. 

Yet even then riding was still unaffordable for the great majority of people, and it would take many years before bikes became cheap enough for all.

Although bikes have not changed design for many years now, today’s versions are without doubt faster, lighter and more reliable than those of the past. 

Indeed, it is obvious to all that cycling is presently going through a golden age. 

The conjunction of new materials and advanced manufacturing methods should bring about additional technological advances; furthermore, as the price of bikes goes down, the chance to own and enjoy a ‘conveyance’ will be available to more people than ever before.

It began its development with the velocipedes or bone-shakers of the nineteenth century, so it has a 200-year pedigree.

Yet even then riding was still unaffordable for the great majority of people, and it would take many years before bikes became cheap enough for all.

Explanation:

Compound sentences are sentences that consist of two or more independent clauses connected by a comma and conjunction or by a semicolon. There are only seven coordinating conjunctions: for, and, nor, but, or, yet, and so.

An independent clause is a clause that can stand alone as a sentence. Every sentence must contain a subject and predicate and express a complete thought. Unlike independent clauses, dependent (subordinate) clauses don't fulfill these criteria, which is why they can't stand alone as sentences.

This means that you need to choose sentences that consist of more than one independent clause and no subordinate clauses. These sentences are:

The underlined parts are independent clauses that make up these sentences.

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