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that1chick
 2 years 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
that1chick
 2 years 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

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that1chick
 2 years ago
Best ResponseYou've already chosen the best response.0Here'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?

that1chick
 2 years ago
Best ResponseYou've already chosen the best response.0I think the next step would be: x=16+sqrt(17)*sqrt(16)/8 then x=16+4sqrt(17)/8 ??

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

Soumyadeep
 2 years ago
Best ResponseYou've already chosen the best response.1So its the second value!

that1chick
 2 years ago
Best ResponseYou've already chosen the best response.0Can you show me how you got that? (:
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