anonymous
  • anonymous
A catapult launches a boulder with an upward velocity of 148 ft/s. The height of the boulder (h) in feet after t seconds is given by the function h = –16t² + 148t + 30. How long does it take the boulder to reach its maximum height? What is the boulder’s maximum height? Round to the nearest hundredth, if necessary. (I don't understand these questions at all :/) 9.25 s; 30 ft 4.63 s; 640.5 ft 4.63 s; 1,056.75 ft 4.63 s; 372.25 ft
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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across
  • across
\[f(t)=-16t^2+148t+30\]Do you know how to differentiate?
anonymous
  • anonymous
nope :/
across
  • across
But you are taking calculus, right?

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anonymous
  • anonymous
no. algebra one
across
  • across
And here sat I thinking that this was a calculus course. I must have had you confused all along.
across
  • across
It is a pain in the butt to solve this using algebra alone: You have to find the roots of that polynomial to find the vertex.
across
  • across
And to do that, you may have to either factor or make use of the good-old\[x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]
across
  • across
Then\[\frac{x_2+x_1}{2}\]will be your vertex.
anonymous
  • anonymous
ohh. thank ya

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