Most of the air crashes are due to pilot error and most of these aircraft involved belong to the Boeing and Mcdonnell. However, a considerable number of air crashes can be attributed to faulty design, such aircraft are Boeing 737-100, -200, DC-10s and etc.

The reason why these aircraft company just can't be terminated is because they're owned by US, shutting them down would tremendously affect the US's economy so the country is doing their best in covering up any mistakes these company do.

Most people would prefer Boeing(or McDonnell or any US-made aircraft) over any other aircraft made by other country despite of so many air incidents they had.

For example, most people would prefer the old 747-100 than the super-sophisticated fly-by-wire A380, despite of so many air crashes 747-100 had on its first 7 years. The A380 has been on service for 7 years and never had a single haul loss.

The same goes to DC-10, people would choose this aircraft over any other aircraft type regardless of the quality or technology, people would always choose US-made aircraft.

Being in the United States Airborne, I can tell you the prep work before a jump is a lot. In order to get a sardine can of men to jump is not easy even with static line. The plane needs to be on level flight, you have to have the right speed, and the right altitude.
Here are the reasons.
1 level flight, you have to be able to be stable to make a proper exit out of the craft. Go to YouTube and watch the united states airborne do a combat jump. I could only imagine a combat jump under fire.
2 right speed, if you jump at the wrong speed the impact with the air can kill you, and tear you chute up if on static line, you have to be able to clear the plane when you make your exit, too fast and you will impact the plane. Also the plane needs a wind break at the door; commercial jets do not have this as well.
3 right altitudes, to high and you cannot breathe, to high and you will freeze.
4 training, how are you going to get a 300 men, women, children, seniors to get chutes on without panic, and an orderly jump at the right speed and attitude. And have a plane that is having mechanical issues, rapid cabin pressure loss, and many other reasons. It just won't happen.
If this happens at altitude you will never know what hit you. Because the rapid pressure loss will cause you lungs to explode and freeze at the same time and most of the time the plane is in the process of coming apart so g forces will tear you apart as well. If you do survive you will pass out and not see what is coming, if you wake up the impact will kill you.
When they fish bodies out of the ocean or on land, it is not whole bodies, it is body parts.
I hope I answered you questions and remember flying is still the safest way to travel.

It depends on the pilot! First for a coast to coast flight there are things a 40-60 hr pilot has not experienced and may well discover. Has he/she had any mountain training or has the route fully avoided those? How good at understanding weather is this particular pilot? Has the pilot had training in leaning an engine at takeoff at higher altitude?

At the average 50-60 hours of a newly minted PPL most of them should consider taking another experienced pilot along! Legally they are free to go, how well they understood and were trained may have an impact on the trip. Judgment is hard to teach, hard to learn, impacts inexperience and experienced pilots! Just check the accident reports.

So the answer is, it depends on the particular pilot and that pilot's training. Some will be fine (all should be) some may not be.
A few flights of 300 to 500 miles might be good prep.

GA does not need any more demonstrations of those like Jessica Dubroff.

. About how many gallons of gasoline are burned per hour by commercial airplanes in flight in the United States? (1 gal = 3,785.41 mL).?

(the beginning of the question)
On average, a commercial airplane burns about 4.0 × 10^3 mL of gasoline per second. There can be as many as 5 × 10^3 airplanes in the air in the United States at any given time. I ust need to find the exponent for the answer 1.9x10^--- gal. If you can, explain! please help. I don't get this at all!!

Good question, even thought it lacked airline info and was posted in the incorrect category, which should have been TRAVEL. When you get your wits about you, call the airline reservation number and be prepared to pay.

In general, it is licences ratings and experience which get you an airline job.

While aviation based degrees will get you a knowledge of aviation, they don't do much for you if flying doesn't work out for you.

Maths and Physical Mechanics (levers etc) will be useful, but really the idea is to get a degree in something that will make you money as a back up position, and learn to fly!

No airline teaches you from scratch, you need to go there with the appropriate licences, ratings and experience.

But have a back up career in mind.