A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
If a baseball player hits a baseball from 4 feet off the ground with an initial velocity of 64 feet per second, how long will it take the baseball to hit the ground? Use the equation h = 16t2 + 64t + 4.
anonymous
 one year ago
If a baseball player hits a baseball from 4 feet off the ground with an initial velocity of 64 feet per second, how long will it take the baseball to hit the ground? Use the equation h = 16t2 + 64t + 4.

This Question is Closed

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2when the ball hits the ground h will = 0 so form an equation and solve for t

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So far I have this 64 +/ sqrt 3840 over 32. But I don't know what to do after that

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2make it easier by taking out 4 4(4t^2  16t  1) = 0 now apply quadratic formula to the expression in the parentheses t =[ 16 + sqrt(256  4*4 * 1) ] / 8

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2t = (16 + 16.49) / 8 (neglect the negative root)

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2haven't you used the quadratic formula before?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes but I didn't get what you got

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2i applied it to 4x^2  16x  1 = 0

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2i divide through by 4 to make it easier

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2this equation will have the same roots as the bigger one

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the answer I got was 16+/ sqrt 17 over 2 is that what you got?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2(16 + sqrt272 ) / 8 = 4.06 secs

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0my answer has to be in the quadratic formula

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2oh ok so that's (16 + sqrt(16*17) ) / 8 = 16 + 4*sqrt17  8 = 2 + 0.5 sqrt17
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.