Question

sd

Answer 1

first, you should not zero out your older questions.

second, this is the same type problem as your previous ones.

Answer 2

Good.

Answer 3

Did you get the correct answer?

Answer 4

Okay, let me check.

Answer 5

splash occurs at 11.2022 seconds

Answer 6

http://www.wolframalpha.com/input/?i=0+%3D+-4.9x%5E2+%2B+44x+%2B+122

Answer 7

max occurs at 4.48979591837seconds and it has y=220.775510204meters above sea-level

Answer 8

Please be specific about what is wrong.

Answer 9

I got an answer different from yours.

Answer 10

Your answer = 11.54 seconds
My answer = 11.2022 seconds

Answer 11

Your answer = 229.96 meters above sea-level
My answer = 220.775510204meters above sea-level

Answer 12

Please tell which answers are incorrect.

Answer 13

jhalt, you typed in the wrong equation into wolfram

Answer 14

Thank you for pointing out my mistake.

Answer 15

@jhalt
11.5445 seconds
11268/49 = 229.959183673 meters above sea-level
http://www.wolframalpha.com/input/?i=0+%3D+-4.9x%5E2+%2B+46x+%2B+122
http://www.wolframalpha.com/input/?i=max%28-4.9x%5E2+%2B+46x+%2B+122%29

Answer 16

Try typing in 11268/49 instead of 229.96 for the second answer.

Answer 17

Maybe an exact improper fraction is preferred to a decimal approximation?

Answer 18

Do decimal approximations usually work?

Answer 19

Me too.

Answer 20

Good question, lets find out.

Answer 21

out of curiosity, why does it work now? did you type it in wrong the first time ?

Answer 22

@phi, I think it works now because the answer 11268/49 is exact while 229.96 is a decimal approximation.

Answer 23

@jhalt first answer is (230 + 6*sqrt(3130))/49

Answer 24

\[\frac{ 230 + 6\sqrt{3130} }{ 49}\]

Answer 25

That is the exact time at which the rocket splashes.