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ladiesman217 Group TitleBest ResponseYou've already chosen the best response.0
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 \[h=16t ^{2}+64t+4\]
 one year ago

mukushla Group TitleBest ResponseYou've already chosen the best response.0
baseball hits the ground when \(h=0\).
 one year ago

ladiesman217 Group TitleBest ResponseYou've already chosen the best response.0
@Shadowys @UnkleRhaukus @TSwizzle can you help me please
 one year ago

Shadowys Group TitleBest ResponseYou've already chosen the best response.1
\(h=16t^2 +64t +4\) when h=0,(the ball hits the ground) \(0=16t^2 +64t +4\) use the general formula. what did u get?
 one year ago

sami21 Group TitleBest ResponseYou've already chosen the best response.0
you need to solve the quadratic equation since h=0 so 16t^+64t+4=0 or 16t^264t4=0 use quadratic formula with a=16 b=64 c=4 you will get two roots t=4 sec t=0.6 but time cannot be negative so neglect the negative value t=4 sec is the required time .
 one year ago

ladiesman217 Group TitleBest ResponseYou've already chosen the best response.0
\[\frac{ 64\sqrt{64^{2}+16*4} }{ 2*16 }\] \[\frac{ 64\sqrt{64^{2}64} }{ 32 }\]
 one year ago

sami21 Group TitleBest ResponseYou've already chosen the best response.0
it should be +64 outside the root because b=64 and there is minus in the formula too .
 one year ago

Shadowys Group TitleBest ResponseYou've already chosen the best response.1
note: it's \(64 \pm \sqrt{64^2  (4)(16)(4)}\) up there.
 one year ago

sami21 Group TitleBest ResponseYou've already chosen the best response.0
correct formula is \[\Large =\frac{b \pm \sqrt{b^24ac}}{2a}\]
 one year ago

ladiesman217 Group TitleBest ResponseYou've already chosen the best response.0
\[\frac{ 64\sqrt{64^{2}+256} }{32}\]
 one year ago

sami21 Group TitleBest ResponseYou've already chosen the best response.0
you miseed plus minus sign :)
 one year ago

Shadowys Group TitleBest ResponseYou've already chosen the best response.1
yup! simplify and you're done (i guess the editor don't have it. the latex is \pm
 one year ago
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