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andreyandreev [35.5K]
3 years ago
6

The function -6t^2+5t+56=h is used to calculate the amount of time (t) in seconds it takes for an object to reach a certain heig

ht (h). According to this function, how many seconds will it take for the object to hit the ground?
Mathematics
1 answer:
seraphim [82]3 years ago
6 0

Answer:

3.5 seconds

Step-by-step explanation:

h(t) is a quadratic function, it indicate that the object start with initial height (56).

If you want to know when the object hit the ground (h=0) you have to use the quadratic formula (-b +- \sqrt{b^{2}-4ac } )/2a and take the positive root (the negative shows a negative time, so we have to discard it).

In this case: a=-6, b=5 and c=56, then the solve is 7/2=3.5

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The length of BC is 4 \sqrt{5}.

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