anonymous
  • anonymous
After 1 second, the ball is 121 feet in the air; after 2 seconds, the ball is 224 feet in the air. Find the height, in feet, of the ball after 3 seconds in the air. use the quadratic function to solve.
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
I think you should indicate if there is initial velocity or not.
anonymous
  • anonymous
The ball was launched from a sling shot. that's all i know.
anonymous
  • anonymous
Sorry my stupid let me try to solve...

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anonymous
  • anonymous
it's okay. :b
anonymous
  • anonymous
\[V0*t-1/2*g*t ^{2}\] V0*1-1/2*g*1=121 v0*2-1/2*g*4=224 After the solving equation , i found V0=130 feet/s , and g=18 feet/s^2 130*3-1/2*18*9=309 feet ,
anonymous
  • anonymous
thanks! would you be interested in helping me with the last 3?
anonymous
  • anonymous
If i can , but what you mean with last 3 ?
anonymous
  • anonymous
i have 3 questions left.
anonymous
  • anonymous
Ahh Okay (: i will try ... shoot!
anonymous
  • anonymous
The company discovered that it costs $37 to produce 3 calculators, $213 to produce 7, $658 to produce 12. Using the quadratic function, find the cost of producing 8 calculators.
anonymous
  • anonymous
Sorry i couldn't solve it. :/
anonymous
  • anonymous
it's okay thanks though

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