Kool Kat 28

A model is launched from a dock at the side of a lake. It's flight path through the air is modelled by the equation h(t) = -5t^2 + 30t + 2, where h is the height of the rocket above ground level in meters and t is the time after the launch in seconds.

a) Determine the time it takes for the rocket to hit the water after initially being launched

b) Fin h'(t) (derivative of h(t)) at the time the rocket hits the water (use the time from d). Interpret the meaning of this value.,

c) Find the maximum height.

d) Find the h'(t) or derivative of h(t) at the time that the maximum height occurs. Interpret the meaning of this value.

I used to have the perfect life, and then all of a sudden, my dad left halfway across the country to do his intern. Now it's been 3 years since I last saw him, and I am just sad that he wasn't part of my life for those 3 years.

My mom earns the money for the family, but today she got fired from her job. SO now, we have no income. And a lot of loans and bills pilling up. I can't work because my mom says she will take care of it, and she will get mad if I do.

I didn't have a childhood because I had to clean, do chores, etc. and I never got the time to actually spend time with any other child my age. Besides, I never had an iPod, or iPhone, or cellphone or computer like they do. I have nothing to offer them if they were my friends anyways, I can't buy anything.

Not only that, I have no other family here other than my mom, dad, brother, and grandma. SO, I cannot go over to my cousins house and play dress up, or talk one on one, or go shopping with close family or friends because I don't have anyone.

I have no friends. At school I am a loner because not a single person cares about what I have to say, so I sit alone away from everyone hoping that someday or one day someone will come and say hello and not ignore me, but I am slowly starting to think it will never happen.

I have no house or apartment to live in. I have been living in someone's basement (apartment) for a year.

All my hopes of becoming someone successful, living in a house, enjoying times with my friends, driving a new car, going to prom, relaxing in the summer, being together with my (whole) family, has been ruined.

I can't cry because I have to be the older sibling for my brother and be strong. But I am tired of believing in God, after what's happened to me & my family. I pray night and day, but yet nothing good ever happens only the bad

So, WHY DOES GOD HATE MY FAMILY? My other cousins don't live like this, and their parents don't work hard at all, they are just greedy and take everything from us. They rub it in our faces all the time. And yet, nothing happens to them. They don't get fired and they live their lives happily. Why does it happen to the good people like my mom and dad? They didn't do anything wrong.

I am just tired of crying, and being miserable. MY LIFE IS PATHETIC.

I am currently living in someone's basement because my family cannot afford a house or apartment. My dad is in Calgary doing his intern and doesn't get a lot of money. My dad doesn't live with me and my family. My mom hasn't paid off her loans and I feel like we are going to go bankrupt. My mom is the sole earner of the family, and I just woke up today to find out she got laid off.

Other than my mom or dad, I have no family here or anywhere that will give us money because all of my mom & dad's sisters and brothers are cheap and won't give us a cent.

To tell you the truth, I have no friends either. I see kids playing and laughing who are my age, and I want to be like them. But I can't because I feel like they will just laugh at me once they know how poor & ugly & stupid & worthless I am.

All my hopes and dreams are crushed because I have no money, and I feel like no future either. Some days, I cry because I feel like I will never make it in this world and I will be penniless and alone.

Does anyone have any words of advice?

a) Create a function that has zero's at 2, -1, and 3, degree of 4, and extends from quadrants 3 to 4.

b) Is this function an odd or even polynomial function? How do you know based on the information given?

c) Why can this function NOT be part of quadrant 1 to 3? Explain How do you know.

It seems to me that all people care about are looks. Why are they so superficial

I feel like crying, because I am so depressed today.

Today has got to be the worst day ever because...

I figured out that some girl asked my crush to prom and I feel like he's going to have sex for the first time with her - i really wanted to be his first.

Then I just got back a test and I failed!

It was raining when I walked home, so, I was covered in rain.

I feel like I am going to fail all my exams

and I HAVE NO FRIENDS... (just realized this today)

and to top it all off... I sat on some gum, so I had gum stuck to my butt for the whole day (and believe me a lot of people saw because I have a huge butt). Which is so EMBARRASSING. Thank god half the school was away for prom, or else I would have died. But still, people saw it...

How would you cope with such a bad day? Do you have any de-stressers?

Anything would help... please... i don't feel like living anymore, my life is so pathetic

Okay, so exams are coming. And I know summer is all chill. But seriously, I don't want to come back to school and be e a "clean slate". I want to keep my prior knowledge. AND I WANT TO GET AHEAD AS WELL (without summer school).

Does anyone have ideas on how to NOT forget everything you have learned in the school year?

Okay so I went to get my eye brows done and it wasn't my usual lady but I let her do my eyebrows and then I saw that she made it PENCIL thin! And now I feel so bad because it totally ruined my face. :'( SOMEONE please tell me what I am supposed to do so I don't look like a freak at school tommrow. I mean I didn't think this was going to happen! I LOOK LIKE I AM ANGRY OR SURPRISED

FML! BTW: how long will it take for it to grow out?!?

Okay so I went to get my eye brows done and it wasn't my usual lady but I let her do my eyebrows and then I saw that she made it PENCIL thin! And now I feel so bad because it totally ruined my face. :'( SOMEONE please tell me what I am supposed to do so I don't look like a freak at school tommrow. I mean I didn't think this was going to happen! I LOOK LIKE I AM ANGRY OR SURPRISED

FML! BTW: how long will it take for it to grow out?!?

I have been looked down upon, made fun of, laughed at, and ignored by every single guy I come across (except my own father, but he had no choice). The girls (I'm a girl btw), say I am nice, but whenever I talk to a guy, he just leaves me hanging and doesn't bother ever contacting me.

I don't even know what I did wrong. It's starting to affect my emotions, and cause some negative thinking. I feel ugly because I feel like no guy will ever like me for me. Can someone help... (and please no negative comments because, I am depressed already).

HELP ME PLEASE:

Q1)

The Horseshoe Falls, on the Niagra River in Ontario is about 48 m high and 780m wide. The water at the top of the falls is moving at 9.0 meters per second and has a depth of 0.80m as it goes over the falls.

a) if the density of the water is 1000 kg per meter cubed, what mass of water goes over the falls every second.

b) What is the change in gravitational energy of this mass of water

Q2 :

A beach ball is thrown straight up with a speed of 10 meters per second from a point 2m above the ground.

a) Assuming there is no air resistance, calculate how far up the ball will go.

b) At what speed will the ball hit the ground

c) Predict the effect that air resistance will have on your answers to a) and b)

All the answers in my text books are so freaking confusing...or maybe I am wrong can someone help

A diver on a high diving board 3.0 m above the water springs upward with a velocity of 1.6m/s (up).

a) with what velocity does she hit the water? (I got -3.3m/s (up)

b) What is the highest point above the water she reaches?

c) If she walked off the diving board rather than springing up and jumping off, would she be traveling faster, slower, or at the same speed when she hits the water?

Q2- A 50 kg diver steps off a 9.0m diving board at the same time as a 100kg diver. Compare the times taken for the two divers to reach the water.

Q3. A student was working on a satellite problem and was working on a solution. he came up with the solution as 57.3 N x s²/m. What was the student solving for?

a) force

b) mass

c) acceleration

d)period

e) radius

on a bad day what makes you keep going and be happy about your life? Who do you live for? etc... I am just curious!

A 0.15kg baseball travelling at 35.0m/s strikes the catcher's mitt which recoiles backwards 10.0 cm as it brings the ball to a rest.

a) what was the force applied by the ball on the glove

b) what was the force applied by the glove on the ball

Oh yes another question... do I have to make 2 free body diagrams or one for this equation?

Thank you for your answers!

A 0.15kg baseball travelling at 35.0m/s strikes the catcher's mitt which recoiles backwards 10.0 cm as it brings the ball to a rest.

a) what was the force applied by the ball on the glove

b) what was the force applied by the glove on the ball

Oh yes another question... do I have to make 2 free body diagrams or one for this equation?

Thank you for your answers!

My motto is I love being alone but I hate being lonely. And when I am with my friends, they ignore me, so I have decided to do things MY way, which is alone. Does it make me look terrible or unapproachable to guys?

i thought being a loner made you more approachable? Can you shed some light? How do I make real friends anyways... friends that won't ignore me?

Okay so I like this guy, and we go to the same school. Only today I saw him at the park playing basketball with his buddies when I was there walking.

I don't have a problem with that but, after I was done walking around the park, I saw him turn his back towards me and bend over (showing me HIS BUTT)... and it's weird because no guy has ever done that to me. What does it mean because I am confused!

And the sad thing is... i really badly wanted to tell him I liked him today... BUT something always comes up.. and I can't do it in front of his friends... :'( is there a way I can talk to him? Any suggestions?