A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
I need somebody to walk me through this, I understand the just of it. PLease Help! Medal and Fan!
anonymous
 one year ago
I need somebody to walk me through this, I understand the just of it. PLease Help! Medal and Fan!

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What is the question? I might be able to help you.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The function H(t) = 16t2 + vt + s shows the height H(t), in feet, of a projectile launched vertically from s feet above the ground after t seconds. The initial speed of the projectile is v feet per second. Part A: The projectile was launched from a height of 96 feet with an initial velocity of 80 feet per second. Create an equation to find the time taken by the projectile to fall on the ground. (2 points) Part B: What is the maximum height that the projectile will reach? Show your work. (2 points) Part C: Another object moves in the air along the path of g(t) = 31 + 32.2t where g(t) is the height, in feet, of the object from the ground at time t seconds. Use a table to find the approximate solution to the equation H(t) = g(t), and explain what the solution represents in the context of the problem? [Use the function H(t) obtained in Part A, and estimate using integer values] (4 points) Part D: Do H(t) and g(t) intersect when the projectile is going up or down, and how do you know? (2 points)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Algebra 1 semester 2, just this and im done the whole thing

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0did you plug in the numbers to create the equation for A?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i tried to but didnt quite understand

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok I just finished it yesterday. Maybe I can see if I had it too

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0this is what i got H(t) = 16(96)^2 + 80(96) + 96

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\(H(t)=16t^2+vt+s\) is the basic equation. You need to replace the v with the velocity they gave you, and replace the s with the initial height. t is the variable, so it stays the same.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0all you need to do is change v to 80 and s to 96

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the velocity is 80 fps and the height is 96 but whats the time?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0time is the independent variable. the projectile has a different height for different values of time. It's 96 in the beginning and then goes up and comes back down

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i actually do need time to type, you know?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sorry, okay s it would be H(t) = 16t^2 + 80t + 96?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Sweet! now could you help with b?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0would you solve for t?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes, for B, the height's going to be the ycoordinate of the vertex using the equation from a.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[t=\frac{ b }{ 2a }\] Look familiar?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0then once you have that t, plug it in to get the height

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes, okay soi got 5/2?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0that's the right time. now put it in for t in the equation from A

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[16(5/2)^2+80(5/2)+96\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh okay, and then solve?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0for c, create a table for the values 0 through 5 and plug them into both equations

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You're looking for the t where you get the same (or pretty close) H for both equations

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is it possible to solve algebraicly without a table?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes, but you probably haven't done it in algebra I. dw:1436390010929:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you'd set the equations equal to each other then solve for t 16t^2 + 80t + 96 = 31+32.2t

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0it's a standard quadratic equation, so maybe you've done that

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0my bad didnt mean to type that

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0both aanswers are rounded but i got t = 1, t = 4

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you want to go with 4 because time has to be positive

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay, so thats the answer for c?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0for D, 4 seconds is after the max height at 2.5 seconds, so it's got to be on the way down

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay, thank you so much! that really helped a lot :)
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.