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anonymous
 5 years ago
A ball is thrown into the air with an upward velocity of 40 ft/s. Its height h in feet after t seconds is given by the function h=16t^2+40t+6.
A. In how many seconds does the ball reach its maximum height?
B. What's the ball's maximum height?
anonymous
 5 years ago
A ball is thrown into the air with an upward velocity of 40 ft/s. Its height h in feet after t seconds is given by the function h=16t^2+40t+6. A. In how many seconds does the ball reach its maximum height? B. What's the ball's maximum height?

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bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0A) h'(t) = 32t + 40 = 0 32t = 40 t = 5/4

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0Test if it's max or min: h" = 32 < 0 therefore it's max

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0B) The ball's maximum height therefore occurs at t = 5/4 and the height is: h(5/4) = 16(5/4)^2 + 40(5/4) +6

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0wait i dont get what you are doing in the first slide

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0Taking the derivative of the function.

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0Did you take calculus?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Yah but you cant square the 32 yet you have to find the t first

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no this is Algerbra advance

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0sorry nanas.. I am doing everything correct, but I don't know how to do this using algebra. Wait actually if u use algebra, just plot the graph.. look at it's highest point, xvalue will be the time and yvalue will be the height.. This is a parabola pointing down..

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0I was using calculus and my method works too, but if u don't know it i can just give u answers..

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I tried that i guess my brain is to advanced lol no I dont get how to plo the points but the anwser would be fine

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0just type in the equation and then use trace.. well the answers would be: A) 5/4 B) 16 * (5/4) ^2 + 40 * (5/4) + 6 <=whatever that equals.. sorry don't feel like doin arithmetic right now.. i actually gotta go to bed lol got a class early 2morro..

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0wow what time is it there

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0wow its only 7 30 here

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0vijay t = 10 secs doesn't make sense.. it's t = 5/4

Vijay
 5 years ago
Best ResponseYou've already chosen the best response.0if u use equation v=u+ft v=0, u=40, f= 10, t= ?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok What is the lil star thing

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0he is asking maximum height..

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0little star is multiplication

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0time at max height..

Vijay
 5 years ago
Best ResponseYou've already chosen the best response.01st find the time, then plug the t into the function, u will get height

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0bahrom is right i remember my online teacher saying this

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh so all i got to do is the multiplication

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0Okay here's proof: At t = 10; h = 16*(10)^2+40*10+6 = 1600 + 400 + 6 is less than 0.. u can't have a negative maximum height.. the ball is still in the air..

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0yeah just plug in 5/4 for t in the h(t) equation and find the answer..

bahrom7893
 5 years ago
Best ResponseYou've already chosen the best response.0Please click on become a fan if I helped, I really want to get to the next level!! Thanks =) I'm off..
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