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Nick2019
 3 years ago
Frank kicks a soccer ball off the ground and in the air with an initial velocity of 30 feet per second. Using the formula H(t) = −16t2 + vt + s, what is the maximum height the soccer ball reaches?
14.1 feet
13.7 feet
13.2 feet
15.2 feet
Nick2019
 3 years ago
Frank kicks a soccer ball off the ground and in the air with an initial velocity of 30 feet per second. Using the formula H(t) = −16t2 + vt + s, what is the maximum height the soccer ball reaches? 14.1 feet 13.7 feet 13.2 feet 15.2 feet

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zepp
 3 years ago
Best ResponseYou've already chosen the best response.3We are looking for the highest point of a facing down parabola, therefore the vertex of the parabola.

SmoothMath
 3 years ago
Best ResponseYou've already chosen the best response.0Do your thing, Zeppy.

Nick2019
 3 years ago
Best ResponseYou've already chosen the best response.0lol i should have read the chapter :/

Nick2019
 3 years ago
Best ResponseYou've already chosen the best response.0lol so whats the answer, nice drawing

SmoothMath
 3 years ago
Best ResponseYou've already chosen the best response.0The eeeeye, it sees everything!

Nick2019
 3 years ago
Best ResponseYou've already chosen the best response.0lol i moved my webcam away from me haha

zepp
 3 years ago
Best ResponseYou've already chosen the best response.3H(t) = −16t2 + vt + s Represents the equation of your parabola, we are looking for the vertex, the xvalue of the vertex could be found by using the formula \[\frac{b}{2a}\]

Nick2019
 3 years ago
Best ResponseYou've already chosen the best response.0so one of these 14.1 feet 13.7 feet 13.2 feet 15.2 feet

zepp
 3 years ago
Best ResponseYou've already chosen the best response.3Now, 30 feet per second. v=30 H(t) = −16t2 + 30t + s

zepp
 3 years ago
Best ResponseYou've already chosen the best response.3Use the formula I wrote above :)

Nick2019
 3 years ago
Best ResponseYou've already chosen the best response.0dont know how to solve that :/ i just need the answer no offence

Nick2019
 3 years ago
Best ResponseYou've already chosen the best response.0ok il guess thanks for the help (in a good way)

zepp
 3 years ago
Best ResponseYou've already chosen the best response.3A quadratic equation is \(ax^2+bx+c\) Where the x of the vertex is at \(\large \frac{b}{2a}\) In our equation H(t) = −16t2 + 30t + s b is 30 and a is 16 \[\frac{30}{2(16)}=\frac{30}{32}=\frac{30}{32}\]

zepp
 3 years ago
Best ResponseYou've already chosen the best response.3What you have to do next it to replace this xvalue back into the equation to find the height (yvalue) And sorry I'm at work so I was afk :(
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