On a model castle, 1 inch equals 83 feet. The model is 10.5 inches wide. What is the actual width of the castle?
1 answer:
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For this case we have the following quadratic equation:
By the time the projectile hits the ground we have the final height equal to zero:
Therefore, we have a second-order polynomial that we must solve:
Using resolver we have:
Rewriting:
Doing the calculations we have two roots:
We discard the negative root because we are looking for time which is greater than zero.
Answer:
the projectile will hit the ground after:
C. 5.3 seconds
By the time the projectile hits the ground we have the final height equal to zero:
Therefore, we have a second-order polynomial that we must solve:
Using resolver we have:
Rewriting:
Doing the calculations we have two roots:
We discard the negative root because we are looking for time which is greater than zero.
Answer:
the projectile will hit the ground after:
C. 5.3 seconds