Who is faster: Griffin running 50 meters in 15.5 seconds or Lael running 60 meters in 19 seconds?
1 answer:
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The answer would be 4.5 × 
Answer:
Explanation:
Here, we want to find the time the rocket will hit the ground
What we have to do is to substitute 0 for the height of the rocket y and solve the quadratic equation that results
That simply means we are solving for:
We can use the quadratic formula to solve this
where a is the coefficient of x^2 which is -16
b is the coefficient of x which is 149
c is the last number which is 108
Substituting the values, we have it that:
Now, we proceed to get the individual x-values:
Since time cannot be negative, we use the first value only