A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
how do i solve this
Y = 16x^2 + 340x + 4500
anonymous
 5 years ago
how do i solve this Y = 16x^2 + 340x + 4500

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Solve it for what? Do you mean you have to solve\[16x^2+340x+4500=0\]?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Or do you have a particular xvalue and you need to find y?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Or do you have a yvalue and you need to find x?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Are you saying y=5200?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0here is the whole problem

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Well, it seems reasonable that y=5200 and you need to find the xvalues that make it so.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.02) Snoopy is in his plane, 4500 feet above the ground. He fires a projectile straight up. The initial velocity of the projectile is 340 feet per second. (After the projectile is fired, it has no acceleration, so its height can be modeled by a “falling body” model.) The Red Baron is maintaining a constant altitude of 5200 feet.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0a. Write an equation describing the upward motion of the projectile. (Assume there is no air resistance. Let y represent the altitude of the projectile in feet, and let t represent the time after firing in seconds.) • Y = 16x^2 + 340x + 4500

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0c. When, on the way up, might the projectile intersect the Red Baron

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0d. If the projectile misses the Red Baron on the way up, when might it intersect him on the way down?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Is the equation for y an equation you found or were you given that?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Well, the problem will depend on the coordinate system you use. If you 'attach' a coordinate system to Snoopy, then when he fires the projectile straight up, it will look like (in your coordinate system) the object is being fired straight up the yaxis. I'm assuming the Red Barron is directly above Snoopy and travelling with same velocity. Does this agree with you so far?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Your equation is correct...so now to finish...

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0y will be 5200, since your coordinate system is based on the ground, though moving along with Snoopy, so you have to solve for t in:\[5200=16t^2+340t+4500\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0There will be two times: the first is the initial impact, the second when it comes back down. It has the same momentum in the xdirection as Snoopy and the Red Barron.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0So there are you answers for c and d.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0okay so how do i find out the two times it crosses the red barons path

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[t=\frac{5}{8}(17\pm \sqrt{177})\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You solve the quadratic equation.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[5200=16t^2+340t+4500 \rightarrow 16t^2+340t700=0\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[t = \frac{340 \pm \sqrt{340^24(16)(700)}}{2(16)}=\frac{340 \pm \sqrt{70800}}{32}s\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0using the quadratic formula (or you can complete the square).

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[\sqrt{70800}=20\sqrt{177}\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Then just simplify to get the answers above. The lower time will be the first strike (answer c), the larger time will be the second strike (answer d).
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.