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Question 4 (Multiple Choice Worth 2 points)
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.
2 plus or minus square root of 17 end root over 2
quantity of 2 plus or minus square root of 17 all over 2
2 plus or minus 4 square root of 17
quantity of 16 plus or minus square root of 17 all over 2
 one year ago
 one year ago
Question 4 (Multiple Choice Worth 2 points) 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. 2 plus or minus square root of 17 end root over 2 quantity of 2 plus or minus square root of 17 all over 2 2 plus or minus 4 square root of 17 quantity of 16 plus or minus square root of 17 all over 2
 one year ago
 one year ago

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that1chickBest ResponseYou've already chosen the best response.0
Here's what I have: h=16t^2+64+4 0=16t^2+64t+4 0=4(4t^216t1) x=b+sqrt(b^24ac)/2a x=(16)+sqrt(16^24(4)(1)/2(4) x=16+sqrt(2564(4)/8 x=16+sqrt(256+16)/8 x=16+sqrt(272)/8 and now I'm stuck... help?
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
I think the next step would be: x=16+sqrt(17)*sqrt(16)/8 then x=16+4sqrt(17)/8 ??
 one year ago

SoumyadeepBest ResponseYou've already chosen the best response.1
\[16t^{2} + 64t + 4 = 0\] would give us \[t = 2  \frac{ \sqrt{17} }{ 2 }\] and \[t = \frac{ 1 }{ 2 }(4+\sqrt{17})\]
 one year ago

SoumyadeepBest ResponseYou've already chosen the best response.1
So its the second value!
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
Can you show me how you got that? (:
 one year ago
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